Mercurial > vim
annotate runtime/doc/if_pyth.txt @ 29655:53e434838a85 v9.0.0168
patch 9.0.0168: cursor positioned wrong with two virtual text properties
Commit: https://github.com/vim/vim/commit/25463610dfc7a4984f70b030463fb98b09772ad9
Author: Bram Moolenaar <Bram@vim.org>
Date: Mon Aug 8 11:07:47 2022 +0100
patch 9.0.0168: cursor positioned wrong with two virtual text properties
Problem: Cursor positioned wrong with two virtual text properties close
together. (Ben Jackson)
Solution: Add the original size, not the computed one. (closes #10864)
author | Bram Moolenaar <Bram@vim.org> |
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date | Mon, 08 Aug 2022 12:15:06 +0200 |
parents | f8116058ca76 |
children | a9b5ffbc0428 |
rev | line source |
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29314 | 1 *if_pyth.txt* For Vim version 9.0. Last change: 2022 Feb 22 |
7 | 2 |
3 | |
4 VIM REFERENCE MANUAL by Paul Moore | |
5 | |
6 | |
7 The Python Interface to Vim *python* *Python* | |
8 | |
3682 | 9 1. Commands |python-commands| |
10 2. The vim module |python-vim| | |
11 3. Buffer objects |python-buffer| | |
12 4. Range objects |python-range| | |
13 5. Window objects |python-window| | |
4496 | 14 6. Tab page objects |python-tabpage| |
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15 7. vim.bindeval objects |python-bindeval-objects| |
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16 8. pyeval(), py3eval() Vim functions |python-pyeval| |
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17 9. Dynamic loading |python-dynamic| |
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18 10. Python 3 |python3| |
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19 11. Python X |python_x| |
11160 | 20 12. Building with Python support |python-building| |
7 | 21 |
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22 The Python 2.x interface is available only when Vim was compiled with the |
7 | 23 |+python| feature. |
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24 The Python 3 interface is available only when Vim was compiled with the |
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25 |+python3| feature. |
5220 | 26 Both can be available at the same time, but read |python-2-and-3|. |
7 | 27 |
27903 | 28 NOTE: Python 2 is old and no longer being developed. Using Python 3 is highly |
29 recommended. Python 2 support will be dropped when it does not work properly | |
30 anymore. | |
31 | |
7 | 32 ============================================================================== |
33 1. Commands *python-commands* | |
34 | |
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35 *:python* *:py* *E263* *E264* *E887* |
7 | 36 :[range]py[thon] {stmt} |
3750 | 37 Execute Python statement {stmt}. A simple check if |
38 the `:python` command is working: > | |
39 :python print "Hello" | |
7 | 40 |
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41 :[range]py[thon] << [trim] [{endmarker}] |
7 | 42 {script} |
43 {endmarker} | |
44 Execute Python script {script}. | |
45 Note: This command doesn't work when the Python | |
46 feature wasn't compiled in. To avoid errors, see | |
47 |script-here|. | |
48 | |
17571 | 49 If [endmarker] is omitted from after the "<<", a dot '.' must be used after |
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50 {script}, like for the |:append| and |:insert| commands. Refer to |
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51 |:let-heredoc| for more information. |
17571 | 52 |
7 | 53 This form of the |:python| command is mainly useful for including python code |
54 in Vim scripts. | |
55 | |
56 Example: > | |
57 function! IcecreamInitialize() | |
58 python << EOF | |
59 class StrawberryIcecream: | |
60 def __call__(self): | |
61 print 'EAT ME' | |
62 EOF | |
63 endfunction | |
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64 |
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65 To see what version of Python you have: > |
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66 :python print(sys.version) |
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67 |
14864 | 68 There is no need to import sys, it's done by default. |
69 | |
26148 | 70 *python-environment* |
71 Environment variables set in Vim are not always available in Python. This | |
27623 | 72 depends on how Vim and Python were built. Also see |
26148 | 73 https://docs.python.org/3/library/os.html#os.environ |
74 | |
4073 | 75 Note: Python is very sensitive to the indenting. Make sure the "class" line |
76 and "EOF" do not have any indent. | |
7 | 77 |
4435 | 78 *:pydo* |
79 :[range]pydo {body} Execute Python function "def _vim_pydo(line, linenr): | |
80 {body}" for each line in the [range], with the | |
81 function arguments being set to the text of each line | |
82 in turn, without a trailing <EOL>, and the current | |
83 line number. The function should return a string or | |
84 None. If a string is returned, it becomes the text of | |
85 the line in the current turn. The default for [range] | |
86 is the whole file: "1,$". | |
87 | |
88 Examples: | |
89 > | |
90 :pydo return "%s\t%d" % (line[::-1], len(line)) | |
91 :pydo if line: return "%4d: %s" % (linenr, line) | |
92 < | |
14668 | 93 One can use `:pydo` in possible conjunction with `:py` to filter a range using |
94 python. For example: > | |
95 | |
96 :py3 << EOF | |
97 needle = vim.eval('@a') | |
98 replacement = vim.eval('@b') | |
99 | |
100 def py_vim_string_replace(str): | |
101 return str.replace(needle, replacement) | |
102 EOF | |
103 :'<,'>py3do return py_vim_string_replace(line) | |
104 < | |
7 | 105 *:pyfile* *:pyf* |
106 :[range]pyf[ile] {file} | |
107 Execute the Python script in {file}. The whole | |
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108 argument is used as a single file name. |
7 | 109 |
110 Both of these commands do essentially the same thing - they execute a piece of | |
111 Python code, with the "current range" |python-range| set to the given line | |
112 range. | |
113 | |
114 In the case of :python, the code to execute is in the command-line. | |
115 In the case of :pyfile, the code to execute is the contents of the given file. | |
116 | |
117 Python commands cannot be used in the |sandbox|. | |
118 | |
119 To pass arguments you need to set sys.argv[] explicitly. Example: > | |
120 | |
121 :python sys.argv = ["foo", "bar"] | |
122 :pyfile myscript.py | |
123 | |
124 Here are some examples *python-examples* > | |
125 | |
126 :python from vim import * | |
127 :python from string import upper | |
128 :python current.line = upper(current.line) | |
129 :python print "Hello" | |
130 :python str = current.buffer[42] | |
131 | |
132 (Note that changes - like the imports - persist from one command to the next, | |
133 just like in the Python interpreter.) | |
134 | |
135 ============================================================================== | |
136 2. The vim module *python-vim* | |
137 | |
138 Python code gets all of its access to vim (with one exception - see | |
236 | 139 |python-output| below) via the "vim" module. The vim module implements two |
7 | 140 methods, three constants, and one error object. You need to import the vim |
141 module before using it: > | |
142 :python import vim | |
143 | |
144 Overview > | |
20 | 145 :py print "Hello" # displays a message |
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146 :py vim.command(cmd) # execute an Ex command |
20 | 147 :py w = vim.windows[n] # gets window "n" |
148 :py cw = vim.current.window # gets the current window | |
149 :py b = vim.buffers[n] # gets buffer "n" | |
150 :py cb = vim.current.buffer # gets the current buffer | |
151 :py w.height = lines # sets the window height | |
152 :py w.cursor = (row, col) # sets the window cursor position | |
153 :py pos = w.cursor # gets a tuple (row, col) | |
154 :py name = b.name # gets the buffer file name | |
155 :py line = b[n] # gets a line from the buffer | |
156 :py lines = b[n:m] # gets a list of lines | |
157 :py num = len(b) # gets the number of lines | |
158 :py b[n] = str # sets a line in the buffer | |
159 :py b[n:m] = [str1, str2, str3] # sets a number of lines at once | |
160 :py del b[n] # deletes a line | |
161 :py del b[n:m] # deletes a number of lines | |
7 | 162 |
163 | |
164 Methods of the "vim" module | |
165 | |
166 vim.command(str) *python-command* | |
236 | 167 Executes the vim (ex-mode) command str. Returns None. |
7 | 168 Examples: > |
20 | 169 :py vim.command("set tw=72") |
170 :py vim.command("%s/aaa/bbb/g") | |
7 | 171 < The following definition executes Normal mode commands: > |
172 def normal(str): | |
173 vim.command("normal "+str) | |
174 # Note the use of single quotes to delimit a string containing | |
175 # double quotes | |
176 normal('"a2dd"aP') | |
177 < *E659* | |
178 The ":python" command cannot be used recursively with Python 2.2 and | |
179 older. This only works with Python 2.3 and later: > | |
20 | 180 :py vim.command("python print 'Hello again Python'") |
7 | 181 |
182 vim.eval(str) *python-eval* | |
183 Evaluates the expression str using the vim internal expression | |
633 | 184 evaluator (see |expression|). Returns the expression result as: |
185 - a string if the Vim expression evaluates to a string or number | |
186 - a list if the Vim expression evaluates to a Vim list | |
856 | 187 - a dictionary if the Vim expression evaluates to a Vim dictionary |
633 | 188 Dictionaries and lists are recursively expanded. |
7 | 189 Examples: > |
14637 | 190 :" value of the 'textwidth' option |
20 | 191 :py text_width = vim.eval("&tw") |
14637 | 192 : |
193 :" contents of the 'a' register | |
18831 | 194 :py a_reg = vim.eval("@a") |
14637 | 195 : |
196 :" Result is a string! Use string.atoi() to convert to a number. | |
197 :py str = vim.eval("12+12") | |
198 : | |
856 | 199 :py tagList = vim.eval('taglist("eval_expr")') |
633 | 200 < The latter will return a python list of python dicts, for instance: |
11062 | 201 [{'cmd': '/^eval_expr(arg, nextcmd)$/', 'static': 0, 'name': ~ |
202 'eval_expr', 'kind': 'f', 'filename': './src/eval.c'}] ~ | |
633 | 203 |
3682 | 204 vim.bindeval(str) *python-bindeval* |
18831 | 205 Like |python-eval|, but returns special objects described in |
206 |python-bindeval-objects|. These python objects let you modify (|List| | |
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207 or |Dictionary|) or call (|Funcref|) vim objects. |
633 | 208 |
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209 vim.strwidth(str) *python-strwidth* |
18831 | 210 Like |strwidth()|: returns number of display cells str occupies, tab |
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211 is counted as one cell. |
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212 |
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213 vim.foreach_rtp(callable) *python-foreach_rtp* |
18831 | 214 Call the given callable for each path in 'runtimepath' until either |
215 callable returns something but None, the exception is raised or there | |
216 are no longer paths. If stopped in case callable returned non-None, | |
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217 vim.foreach_rtp function returns the value returned by callable. |
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218 |
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219 vim.chdir(*args, **kwargs) *python-chdir* |
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220 vim.fchdir(*args, **kwargs) *python-fchdir* |
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221 Run os.chdir or os.fchdir, then all appropriate vim stuff. |
18831 | 222 Note: you should not use these functions directly, use os.chdir and |
223 os.fchdir instead. Behavior of vim.fchdir is undefined in case | |
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224 os.fchdir does not exist. |
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225 |
7 | 226 Error object of the "vim" module |
227 | |
228 vim.error *python-error* | |
229 Upon encountering a Vim error, Python raises an exception of type | |
230 vim.error. | |
231 Example: > | |
232 try: | |
233 vim.command("put a") | |
234 except vim.error: | |
235 # nothing in register a | |
236 | |
237 Constants of the "vim" module | |
238 | |
239 Note that these are not actually constants - you could reassign them. | |
240 But this is silly, as you would then lose access to the vim objects | |
241 to which the variables referred. | |
242 | |
243 vim.buffers *python-buffers* | |
4393 | 244 A mapping object providing access to the list of vim buffers. The |
7 | 245 object supports the following operations: > |
20 | 246 :py b = vim.buffers[i] # Indexing (read-only) |
247 :py b in vim.buffers # Membership test | |
248 :py n = len(vim.buffers) # Number of elements | |
4397 | 249 :py for b in vim.buffers: # Iterating over buffer list |
7 | 250 < |
251 vim.windows *python-windows* | |
236 | 252 A sequence object providing access to the list of vim windows. The |
7 | 253 object supports the following operations: > |
20 | 254 :py w = vim.windows[i] # Indexing (read-only) |
255 :py w in vim.windows # Membership test | |
256 :py n = len(vim.windows) # Number of elements | |
257 :py for w in vim.windows: # Sequential access | |
18831 | 258 < Note: vim.windows object always accesses current tab page. |
259 |python-tabpage|.windows objects are bound to parent |python-tabpage| | |
260 object and always use windows from that tab page (or throw vim.error | |
261 in case tab page was deleted). You can keep a reference to both | |
262 without keeping a reference to vim module object or |python-tabpage|, | |
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263 they will not lose their properties in this case. |
4401 | 264 |
265 vim.tabpages *python-tabpages* | |
18831 | 266 A sequence object providing access to the list of vim tab pages. The |
4401 | 267 object supports the following operations: > |
268 :py t = vim.tabpages[i] # Indexing (read-only) | |
269 :py t in vim.tabpages # Membership test | |
270 :py n = len(vim.tabpages) # Number of elements | |
271 :py for t in vim.tabpages: # Sequential access | |
7 | 272 < |
273 vim.current *python-current* | |
274 An object providing access (via specific attributes) to various | |
275 "current" objects available in vim: | |
276 vim.current.line The current line (RW) String | |
4407 | 277 vim.current.buffer The current buffer (RW) Buffer |
278 vim.current.window The current window (RW) Window | |
279 vim.current.tabpage The current tab page (RW) TabPage | |
7 | 280 vim.current.range The current line range (RO) Range |
281 | |
236 | 282 The last case deserves a little explanation. When the :python or |
7 | 283 :pyfile command specifies a range, this range of lines becomes the |
236 | 284 "current range". A range is a bit like a buffer, but with all access |
285 restricted to a subset of lines. See |python-range| for more details. | |
7 | 286 |
18831 | 287 Note: When assigning to vim.current.{buffer,window,tabpage} it expects |
288 valid |python-buffer|, |python-window| or |python-tabpage| objects | |
289 respectively. Assigning triggers normal (with |autocommand|s) | |
290 switching to given buffer, window or tab page. It is the only way to | |
291 switch UI objects in python: you can't assign to | |
292 |python-tabpage|.window attribute. To switch without triggering | |
4407 | 293 autocommands use > |
294 py << EOF | |
295 saved_eventignore = vim.options['eventignore'] | |
296 vim.options['eventignore'] = 'all' | |
297 try: | |
298 vim.current.buffer = vim.buffers[2] # Switch to buffer 2 | |
299 finally: | |
300 vim.options['eventignore'] = saved_eventignore | |
301 EOF | |
302 < | |
4323 | 303 vim.vars *python-vars* |
304 vim.vvars *python-vvars* | |
18831 | 305 Dictionary-like objects holding dictionaries with global (|g:|) and |
306 vim (|v:|) variables respectively. Identical to `vim.bindeval("g:")`, | |
4323 | 307 but faster. |
7 | 308 |
4350 | 309 vim.options *python-options* |
18831 | 310 Object partly supporting mapping protocol (supports setting and |
4350 | 311 getting items) providing a read-write access to global options. |
312 Note: unlike |:set| this provides access only to global options. You | |
313 cannot use this object to obtain or set local options' values or | |
314 access local-only options in any fashion. Raises KeyError if no global | |
315 option with such name exists (i.e. does not raise KeyError for | |
316 |global-local| options and global only options, but does for window- | |
317 and buffer-local ones). Use |python-buffer| objects to access to | |
318 buffer-local options and |python-window| objects to access to | |
319 window-local options. | |
320 | |
18831 | 321 Type of this object is available via "Options" attribute of vim |
4496 | 322 module. |
323 | |
7 | 324 Output from Python *python-output* |
325 Vim displays all Python code output in the Vim message area. Normal | |
326 output appears as information messages, and error output appears as | |
327 error messages. | |
328 | |
329 In implementation terms, this means that all output to sys.stdout | |
330 (including the output from print statements) appears as information | |
331 messages, and all output to sys.stderr (including error tracebacks) | |
332 appears as error messages. | |
333 | |
334 *python-input* | |
335 Input (via sys.stdin, including input() and raw_input()) is not | |
236 | 336 supported, and may cause the program to crash. This should probably be |
7 | 337 fixed. |
338 | |
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339 *python2-directory* *python3-directory* *pythonx-directory* |
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340 Python 'runtimepath' handling *python-special-path* |
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341 |
18831 | 342 In python vim.VIM_SPECIAL_PATH special directory is used as a replacement for |
343 the list of paths found in 'runtimepath': with this directory in sys.path and | |
344 vim.path_hooks in sys.path_hooks python will try to load module from | |
345 {rtp}/python2 (or python3) and {rtp}/pythonx (for both python versions) for | |
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346 each {rtp} found in 'runtimepath'. |
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347 |
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348 Implementation is similar to the following, but written in C: > |
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349 |
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350 from imp import find_module, load_module |
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351 import vim |
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352 import sys |
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353 |
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354 class VimModuleLoader(object): |
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355 def __init__(self, module): |
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356 self.module = module |
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357 |
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358 def load_module(self, fullname, path=None): |
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359 return self.module |
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360 |
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361 def _find_module(fullname, oldtail, path): |
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362 idx = oldtail.find('.') |
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363 if idx > 0: |
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364 name = oldtail[:idx] |
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365 tail = oldtail[idx+1:] |
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366 fmr = find_module(name, path) |
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367 module = load_module(fullname[:-len(oldtail)] + name, *fmr) |
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368 return _find_module(fullname, tail, module.__path__) |
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369 else: |
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370 fmr = find_module(fullname, path) |
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371 return load_module(fullname, *fmr) |
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372 |
18831 | 373 # It uses vim module itself in place of VimPathFinder class: it does not |
374 # matter for python which object has find_module function attached to as | |
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375 # an attribute. |
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376 class VimPathFinder(object): |
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377 @classmethod |
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378 def find_module(cls, fullname, path=None): |
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379 try: |
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380 return VimModuleLoader(_find_module(fullname, fullname, path or vim._get_paths())) |
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381 except ImportError: |
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382 return None |
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383 |
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384 @classmethod |
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385 def load_module(cls, fullname, path=None): |
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386 return _find_module(fullname, fullname, path or vim._get_paths()) |
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387 |
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388 def hook(path): |
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389 if path == vim.VIM_SPECIAL_PATH: |
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390 return VimPathFinder |
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391 else: |
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392 raise ImportError |
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393 |
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394 sys.path_hooks.append(hook) |
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395 |
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396 vim.VIM_SPECIAL_PATH *python-VIM_SPECIAL_PATH* |
18831 | 397 String constant used in conjunction with vim path hook. If path hook |
398 installed by vim is requested to handle anything but path equal to | |
399 vim.VIM_SPECIAL_PATH constant it raises ImportError. In the only other | |
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400 case it uses special loader. |
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401 |
18831 | 402 Note: you must not use value of this constant directly, always use |
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403 vim.VIM_SPECIAL_PATH object. |
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404 |
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405 vim.find_module(...) *python-find_module* |
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406 vim.path_hook(path) *python-path_hook* |
18831 | 407 Methods or objects used to implement path loading as described above. |
408 You should not be using any of these directly except for vim.path_hook | |
409 in case you need to do something with sys.meta_path. It is not | |
410 guaranteed that any of the objects will exist in the future vim | |
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411 versions. |
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412 |
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413 vim._get_paths *python-_get_paths* |
18831 | 414 Methods returning a list of paths which will be searched for by path |
415 hook. You should not rely on this method being present in future | |
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416 versions, but can use it for debugging. |
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417 |
18831 | 418 It returns a list of {rtp}/python2 (or {rtp}/python3) and |
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419 {rtp}/pythonx directories for each {rtp} in 'runtimepath'. |
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420 |
7 | 421 ============================================================================== |
422 3. Buffer objects *python-buffer* | |
423 | |
236 | 424 Buffer objects represent vim buffers. You can obtain them in a number of ways: |
7 | 425 - via vim.current.buffer (|python-current|) |
426 - from indexing vim.buffers (|python-buffers|) | |
427 - from the "buffer" attribute of a window (|python-window|) | |
428 | |
3312 | 429 Buffer objects have two read-only attributes - name - the full file name for |
430 the buffer, and number - the buffer number. They also have three methods | |
431 (append, mark, and range; see below). | |
7 | 432 |
236 | 433 You can also treat buffer objects as sequence objects. In this context, they |
7 | 434 act as if they were lists (yes, they are mutable) of strings, with each |
236 | 435 element being a line of the buffer. All of the usual sequence operations, |
7 | 436 including indexing, index assignment, slicing and slice assignment, work as |
236 | 437 you would expect. Note that the result of indexing (slicing) a buffer is a |
438 string (list of strings). This has one unusual consequence - b[:] is different | |
439 from b. In particular, "b[:] = None" deletes the whole of the buffer, whereas | |
7 | 440 "b = None" merely updates the variable b, with no effect on the buffer. |
441 | |
236 | 442 Buffer indexes start at zero, as is normal in Python. This differs from vim |
443 line numbers, which start from 1. This is particularly relevant when dealing | |
7 | 444 with marks (see below) which use vim line numbers. |
445 | |
4350 | 446 The buffer object attributes are: |
18831 | 447 b.vars Dictionary-like object used to access |
4350 | 448 |buffer-variable|s. |
18831 | 449 b.options Mapping object (supports item getting, setting and |
450 deleting) that provides access to buffer-local options | |
451 and buffer-local values of |global-local| options. Use | |
452 |python-window|.options if option is window-local, | |
453 this object will raise KeyError. If option is | |
454 |global-local| and local value is missing getting it | |
4350 | 455 will return None. |
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456 b.name String, RW. Contains buffer name (full path). |
18831 | 457 Note: when assigning to b.name |BufFilePre| and |
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458 |BufFilePost| autocommands are launched. |
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459 b.number Buffer number. Can be used as |python-buffers| key. |
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460 Read-only. |
18831 | 461 b.valid True or False. Buffer object becomes invalid when |
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462 corresponding buffer is wiped out. |
4350 | 463 |
7 | 464 The buffer object methods are: |
465 b.append(str) Append a line to the buffer | |
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466 b.append(str, nr) Idem, below line "nr" |
7 | 467 b.append(list) Append a list of lines to the buffer |
468 Note that the option of supplying a list of strings to | |
469 the append method differs from the equivalent method | |
470 for Python's built-in list objects. | |
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471 b.append(list, nr) Idem, below line "nr" |
7 | 472 b.mark(name) Return a tuple (row,col) representing the position |
473 of the named mark (can also get the []"<> marks) | |
474 b.range(s,e) Return a range object (see |python-range|) which | |
475 represents the part of the given buffer between line | |
476 numbers s and e |inclusive|. | |
477 | |
20 | 478 Note that when adding a line it must not contain a line break character '\n'. |
479 A trailing '\n' is allowed and ignored, so that you can do: > | |
480 :py b.append(f.readlines()) | |
481 | |
4496 | 482 Buffer object type is available using "Buffer" attribute of vim module. |
483 | |
7 | 484 Examples (assume b is the current buffer) > |
20 | 485 :py print b.name # write the buffer file name |
486 :py b[0] = "hello!!!" # replace the top line | |
487 :py b[:] = None # delete the whole buffer | |
488 :py del b[:] # delete the whole buffer | |
489 :py b[0:0] = [ "a line" ] # add a line at the top | |
490 :py del b[2] # delete a line (the third) | |
491 :py b.append("bottom") # add a line at the bottom | |
492 :py n = len(b) # number of lines | |
493 :py (row,col) = b.mark('a') # named mark | |
494 :py r = b.range(1,5) # a sub-range of the buffer | |
4323 | 495 :py b.vars["foo"] = "bar" # assign b:foo variable |
4350 | 496 :py b.options["ff"] = "dos" # set fileformat |
497 :py del b.options["ar"] # same as :set autoread< | |
7 | 498 |
499 ============================================================================== | |
500 4. Range objects *python-range* | |
501 | |
236 | 502 Range objects represent a part of a vim buffer. You can obtain them in a |
7 | 503 number of ways: |
504 - via vim.current.range (|python-current|) | |
505 - from a buffer's range() method (|python-buffer|) | |
506 | |
236 | 507 A range object is almost identical in operation to a buffer object. However, |
7 | 508 all operations are restricted to the lines within the range (this line range |
509 can, of course, change as a result of slice assignments, line deletions, or | |
510 the range.append() method). | |
511 | |
512 The range object attributes are: | |
513 r.start Index of first line into the buffer | |
514 r.end Index of last line into the buffer | |
515 | |
516 The range object methods are: | |
517 r.append(str) Append a line to the range | |
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518 r.append(str, nr) Idem, after line "nr" |
7 | 519 r.append(list) Append a list of lines to the range |
520 Note that the option of supplying a list of strings to | |
521 the append method differs from the equivalent method | |
522 for Python's built-in list objects. | |
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523 r.append(list, nr) Idem, after line "nr" |
7 | 524 |
4496 | 525 Range object type is available using "Range" attribute of vim module. |
526 | |
7 | 527 Example (assume r is the current range): |
528 # Send all lines in a range to the default printer | |
529 vim.command("%d,%dhardcopy!" % (r.start+1,r.end+1)) | |
530 | |
531 ============================================================================== | |
532 5. Window objects *python-window* | |
533 | |
236 | 534 Window objects represent vim windows. You can obtain them in a number of ways: |
7 | 535 - via vim.current.window (|python-current|) |
536 - from indexing vim.windows (|python-windows|) | |
4401 | 537 - from indexing "windows" attribute of a tab page (|python-tabpage|) |
538 - from the "window" attribute of a tab page (|python-tabpage|) | |
7 | 539 |
236 | 540 You can manipulate window objects only through their attributes. They have no |
7 | 541 methods, and no sequence or other interface. |
542 | |
543 Window attributes are: | |
544 buffer (read-only) The buffer displayed in this window | |
545 cursor (read-write) The current cursor position in the window | |
546 This is a tuple, (row,col). | |
547 height (read-write) The window height, in rows | |
548 width (read-write) The window width, in columns | |
18831 | 549 vars (read-only) The window |w:| variables. Attribute is |
550 unassignable, but you can change window | |
4323 | 551 variables this way |
18831 | 552 options (read-only) The window-local options. Attribute is |
553 unassignable, but you can change window | |
554 options this way. Provides access only to | |
555 window-local options, for buffer-local use | |
556 |python-buffer| and for global ones use | |
557 |python-options|. If option is |global-local| | |
558 and local value is missing getting it will | |
4350 | 559 return None. |
4379 | 560 number (read-only) Window number. The first window has number 1. |
561 This is zero in case it cannot be determined | |
562 (e.g. when the window object belongs to other | |
563 tab page). | |
4431 | 564 row, col (read-only) On-screen window position in display cells. |
4383 | 565 First position is zero. |
4431 | 566 tabpage (read-only) Window tab page. |
18831 | 567 valid (read-write) True or False. Window object becomes invalid |
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568 when corresponding window is closed. |
4383 | 569 |
7 | 570 The height attribute is writable only if the screen is split horizontally. |
571 The width attribute is writable only if the screen is split vertically. | |
572 | |
4496 | 573 Window object type is available using "Window" attribute of vim module. |
574 | |
7 | 575 ============================================================================== |
4401 | 576 6. Tab page objects *python-tabpage* |
577 | |
18831 | 578 Tab page objects represent vim tab pages. You can obtain them in a number of |
4401 | 579 ways: |
580 - via vim.current.tabpage (|python-current|) | |
581 - from indexing vim.tabpages (|python-tabpages|) | |
582 | |
18831 | 583 You can use this object to access tab page windows. They have no methods and |
4401 | 584 no sequence or other interfaces. |
585 | |
586 Tab page attributes are: | |
18831 | 587 number The tab page number like the one returned by |
4401 | 588 |tabpagenr()|. |
589 windows Like |python-windows|, but for current tab page. | |
590 vars The tab page |t:| variables. | |
591 window Current tabpage window. | |
18831 | 592 valid True or False. Tab page object becomes invalid when |
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593 corresponding tab page is closed. |
4401 | 594 |
4496 | 595 TabPage object type is available using "TabPage" attribute of vim module. |
596 | |
4401 | 597 ============================================================================== |
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598 7. vim.bindeval objects *python-bindeval-objects* |
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599 |
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600 vim.Dictionary object *python-Dictionary* |
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601 Dictionary-like object providing access to vim |Dictionary| type. |
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602 Attributes: |
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603 Attribute Description ~ |
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604 locked One of *python-.locked* |
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605 Value Description ~ |
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606 zero Variable is not locked |
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607 vim.VAR_LOCKED Variable is locked, but can be unlocked |
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608 vim.VAR_FIXED Variable is locked and can't be unlocked |
18831 | 609 Read-write. You can unlock locked variable by assigning |
610 `True` or `False` to this attribute. No recursive locking | |
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611 is supported. |
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612 scope One of |
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613 Value Description ~ |
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614 zero Dictionary is not a scope one |
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615 vim.VAR_DEF_SCOPE |g:| or |l:| dictionary |
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616 vim.VAR_SCOPE Other scope dictionary, |
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617 see |internal-variables| |
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618 Methods (note: methods do not support keyword arguments): |
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619 Method Description ~ |
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620 keys() Returns a list with dictionary keys. |
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621 values() Returns a list with dictionary values. |
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622 items() Returns a list of 2-tuples with dictionary contents. |
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623 update(iterable), update(dictionary), update(**kwargs) |
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624 Adds keys to dictionary. |
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625 get(key[, default=None]) |
18831 | 626 Obtain key from dictionary, returning the default if it is |
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627 not present. |
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628 pop(key[, default]) |
18831 | 629 Remove specified key from dictionary and return |
630 corresponding value. If key is not found and default is | |
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631 given returns the default, otherwise raises KeyError. |
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632 popitem() |
18831 | 633 Remove random key from dictionary and return (key, value) |
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634 pair. |
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635 has_key(key) |
18831 | 636 Check whether dictionary contains specified key, similar |
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637 to `key in dict`. |
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638 |
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639 __new__(), __new__(iterable), __new__(dictionary), __new__(update) |
18831 | 640 You can use `vim.Dictionary()` to create new vim |
641 dictionaries. `d=vim.Dictionary(arg)` is the same as | |
642 `d=vim.bindeval('{}');d.update(arg)`. Without arguments | |
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643 constructs empty dictionary. |
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644 |
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645 Examples: > |
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646 d = vim.Dictionary(food="bar") # Constructor |
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647 d['a'] = 'b' # Item assignment |
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648 print d['a'] # getting item |
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649 d.update({'c': 'd'}) # .update(dictionary) |
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650 d.update(e='f') # .update(**kwargs) |
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651 d.update((('g', 'h'), ('i', 'j'))) # .update(iterable) |
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652 for key in d.keys(): # .keys() |
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653 for val in d.values(): # .values() |
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654 for key, val in d.items(): # .items() |
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655 print isinstance(d, vim.Dictionary) # True |
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656 for key in d: # Iteration over keys |
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657 class Dict(vim.Dictionary): # Subclassing |
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658 < |
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659 Note: when iterating over keys you should not modify dictionary. |
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660 |
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661 vim.List object *python-List* |
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662 Sequence-like object providing access to vim |List| type. |
18831 | 663 Supports `.locked` attribute, see |python-.locked|. Also supports the |
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664 following methods: |
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665 Method Description ~ |
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666 extend(item) Add items to the list. |
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667 |
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668 __new__(), __new__(iterable) |
18831 | 669 You can use `vim.List()` to create new vim lists. |
670 `l=vim.List(iterable)` is the same as | |
671 `l=vim.bindeval('[]');l.extend(iterable)`. Without | |
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672 arguments constructs empty list. |
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673 Examples: > |
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674 l = vim.List("abc") # Constructor, result: ['a', 'b', 'c'] |
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675 l.extend(['abc', 'def']) # .extend() method |
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676 print l[1:] # slicing |
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677 l[:0] = ['ghi', 'jkl'] # slice assignment |
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678 print l[0] # getting item |
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679 l[0] = 'mno' # assignment |
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680 for i in l: # iteration |
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681 print isinstance(l, vim.List) # True |
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682 class List(vim.List): # Subclassing |
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683 |
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684 vim.Function object *python-Function* |
18831 | 685 Function-like object, acting like vim |Funcref| object. Accepts special |
686 keyword argument `self`, see |Dictionary-function|. You can also use | |
687 `vim.Function(name)` constructor, it is the same as | |
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688 `vim.bindeval('function(%s)'%json.dumps(name))`. |
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689 |
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690 Attributes (read-only): |
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691 Attribute Description ~ |
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692 name Function name. |
18831 | 693 args `None` or a |python-List| object with arguments. Note |
694 that this is a copy of the arguments list, constructed | |
695 each time you request this attribute. Modifications made | |
696 to the list will be ignored (but not to the containers | |
697 inside argument list: this is like |copy()| and not | |
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698 |deepcopy()|). |
18831 | 699 self `None` or a |python-Dictionary| object with self |
700 dictionary. Note that explicit `self` keyword used when | |
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701 calling resulting object overrides this attribute. |
18831 | 702 auto_rebind Boolean. True if partial created from this Python object |
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703 and stored in the Vim script dictionary should be |
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704 automatically rebound to the dictionary it is stored in |
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705 when this dictionary is indexed. Exposes Vim internal |
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706 difference between `dict.func` (auto_rebind=True) and |
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707 `function(dict.func,dict)` (auto_rebind=False). This |
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708 attribute makes no sense if `self` attribute is `None`. |
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709 |
18831 | 710 Constructor additionally accepts `args`, `self` and `auto_rebind` |
711 keywords. If `args` and/or `self` argument is given then it constructs | |
712 a partial, see |function()|. `auto_rebind` is only used when `self` | |
713 argument is given, otherwise it is assumed to be `True` regardless of | |
714 whether it was given or not. If `self` is given then it defaults to | |
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715 `False`. |
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716 |
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717 Examples: > |
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718 f = vim.Function('tr') # Constructor |
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719 print f('abc', 'a', 'b') # Calls tr('abc', 'a', 'b') |
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720 vim.command(''' |
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721 function DictFun() dict |
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722 return self |
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723 endfunction |
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724 ''') |
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725 f = vim.bindeval('function("DictFun")') |
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726 print f(self={}) # Like call('DictFun', [], {}) |
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727 print isinstance(f, vim.Function) # True |
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728 |
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729 p = vim.Function('DictFun', self={}) |
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730 print f() |
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731 p = vim.Function('tr', args=['abc', 'a']) |
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732 print f('b') |
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733 |
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734 ============================================================================== |
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735 8. pyeval() and py3eval() Vim functions *python-pyeval* |
3682 | 736 |
18831 | 737 To facilitate bi-directional interface, you can use |pyeval()| and |py3eval()| |
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738 functions to evaluate Python expressions and pass their values to Vim script. |
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739 |pyxeval()| is also available. |
3682 | 740 |
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741 The Python value "None" is converted to v:none. |
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742 |
3682 | 743 ============================================================================== |
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744 9. Dynamic loading *python-dynamic* |
557 | 745 |
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746 On MS-Windows and Unix the Python library can be loaded dynamically. The |
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747 |:version| output then includes |+python/dyn| or |+python3/dyn|. |
557 | 748 |
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749 This means that Vim will search for the Python DLL or shared library file only |
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750 when needed. When you don't use the Python interface you don't need it, thus |
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751 you can use Vim without this file. |
557 | 752 |
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753 |
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754 MS-Windows ~ |
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755 |
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756 To use the Python interface the Python DLL must be in your search path. In a |
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757 console window type "path" to see what directories are used. The 'pythondll' |
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758 or 'pythonthreedll' option can be also used to specify the Python DLL. |
557 | 759 |
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760 The name of the DLL should match the Python version Vim was compiled with. |
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761 Currently the name for Python 2 is "python27.dll", that is for Python 2.7. |
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762 That is the default value for 'pythondll'. For Python 3 it is python36.dll |
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763 (Python 3.6). To know for sure edit "gvim.exe" and search for |
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764 "python\d*.dll\c". |
557 | 765 |
8673
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766 |
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767 Unix ~ |
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768 |
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769 The 'pythondll' or 'pythonthreedll' option can be used to specify the Python |
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770 shared library file instead of DYNAMIC_PYTHON_DLL or DYNAMIC_PYTHON3_DLL file |
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771 what were specified at compile time. The version of the shared library must |
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772 match the Python 2.x or Python 3 version Vim was compiled with. |
7196
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773 |
557 | 774 ============================================================================== |
4627
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775 10. Python 3 *python3* |
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776 |
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777 *:py3* *:python3* |
18750 | 778 :[range]py3 {stmt} |
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779 :[range]py3 << [trim] [{endmarker}] |
18750 | 780 {script} |
781 {endmarker} | |
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782 |
18750 | 783 :[range]python3 {stmt} |
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784 :[range]python3 << [trim] [{endmarker}] |
18750 | 785 {script} |
786 {endmarker} | |
787 The `:py3` and `:python3` commands work similar to `:python`. A | |
788 simple check if the `:py3` command is working: > | |
789 :py3 print("Hello") | |
790 < | |
791 To see what version of Python you have: > | |
792 :py3 import sys | |
793 :py3 print(sys.version) | |
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794 < *:py3file* |
18750 | 795 :[range]py3f[ile] {file} |
796 The `:py3file` command works similar to `:pyfile`. | |
8951
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797 *:py3do* |
18750 | 798 :[range]py3do {body} |
799 The `:py3do` command works similar to `:pydo`. | |
4417 | 800 |
3682 | 801 |
2409
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802 Vim can be built in four ways (:version output): |
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803 1. No Python support (-python, -python3) |
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804 2. Python 2 support only (+python or +python/dyn, -python3) |
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805 3. Python 3 support only (-python, +python3 or +python3/dyn) |
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806 4. Python 2 and 3 support (+python/dyn, +python3/dyn) |
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807 |
5220 | 808 Some more details on the special case 4: *python-2-and-3* |
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809 |
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810 When Python 2 and Python 3 are both supported they must be loaded dynamically. |
2540 | 811 |
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812 When doing this on Linux/Unix systems and importing global symbols, this leads |
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813 to a crash when the second Python version is used. So either global symbols |
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814 are loaded but only one Python version is activated, or no global symbols are |
2608
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815 loaded. The latter makes Python's "import" fail on libraries that expect the |
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816 symbols to be provided by Vim. |
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817 *E836* *E837* |
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818 Vim's configuration script makes a guess for all libraries based on one |
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819 standard Python library (termios). If importing this library succeeds for |
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820 both Python versions, then both will be made available in Vim at the same |
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821 time. If not, only the version first used in a session will be enabled. |
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822 When trying to use the other one you will get the E836 or E837 error message. |
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823 |
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824 Here Vim's behavior depends on the system in which it was configured. In a |
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825 system where both versions of Python were configured with --enable-shared, |
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826 both versions of Python will be activated at the same time. There will still |
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827 be problems with other third party libraries that were not linked to |
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828 libPython. |
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829 |
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830 To work around such problems there are these options: |
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831 1. The problematic library is recompiled to link to the according |
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832 libpython.so. |
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833 2. Vim is recompiled for only one Python version. |
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834 3. You undefine PY_NO_RTLD_GLOBAL in auto/config.h after configuration. This |
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835 may crash Vim though. |
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836 |
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837 *E880* |
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838 Raising SystemExit exception in python isn't endorsed way to quit vim, use: > |
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839 :py vim.command("qall!") |
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840 < |
27623 | 841 *E1266* |
29290 | 842 This error can occur when Python 3 cannot load the required modules. This |
843 means that your Python 3 is not correctly installed or there are some mistakes | |
27623 | 844 in your settings. Please check the following items: |
29290 | 845 1. Make sure that Python 3 is correctly installed. Also check the version of |
27623 | 846 python. |
847 2. Check the 'pythonthreedll' option. | |
848 3. Check the 'pythonthreehome' option. | |
849 4. Check the PATH environment variable if you don't set 'pythonthreedll'. | |
850 On MS-Windows, you can use where.exe to check which dll will be loaded. | |
851 E.g. > | |
852 where.exe python310.dll | |
853 5. Check the PYTHONPATH and PYTHONHOME environment variables. | |
5088
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854 |
2826 | 855 *has-python* |
856 You can test what Python version is available with: > | |
857 if has('python') | |
3082 | 858 echo 'there is Python 2.x' |
13125 | 859 endif |
860 if has('python3') | |
2826 | 861 echo 'there is Python 3.x' |
862 endif | |
863 | |
864 Note however, that when Python 2 and 3 are both available and loaded | |
865 dynamically, these has() calls will try to load them. If only one can be | |
866 loaded at a time, just checking if Python 2 or 3 are available will prevent | |
867 the other one from being available. | |
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868 |
13125 | 869 To avoid loading the dynamic library, only check if Vim was compiled with |
870 python support: > | |
871 if has('python_compiled') | |
872 echo 'compiled with Python 2.x support' | |
13231 | 873 if has('python_dynamic') |
874 echo 'Python 2.x dynamically loaded' | |
13125 | 875 endif |
876 endif | |
877 if has('python3_compiled') | |
878 echo 'compiled with Python 3.x support' | |
13231 | 879 if has('python3_dynamic') |
880 echo 'Python 3.x dynamically loaded' | |
13125 | 881 endif |
882 endif | |
883 | |
884 This also tells you whether Python is dynamically loaded, which will fail if | |
885 the runtime library cannot be found. | |
886 | |
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887 ============================================================================== |
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888 11. Python X *python_x* *pythonx* |
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889 |
29290 | 890 Because most python code can be written so that it works with Python 2.6+ and |
891 Python 3 the pyx* functions and commands have been written. They work exactly | |
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892 the same as the Python 2 and 3 variants, but select the Python version using |
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893 the 'pyxversion' setting. |
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894 |
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895 You should set 'pyxversion' in your |.vimrc| to prefer Python 2 or Python 3 |
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896 for Python commands. If you change this setting at runtime you may risk that |
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897 state of plugins (such as initialization) may be lost. |
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898 |
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899 If you want to use a module, you can put it in the {rtp}/pythonx directory. |
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900 See |pythonx-directory|. |
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901 |
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902 *:pyx* *:pythonx* |
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903 The `:pyx` and `:pythonx` commands work similar to `:python`. A simple check |
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904 if the `:pyx` command is working: > |
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905 :pyx print("Hello") |
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906 |
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907 To see what version of Python is being used: > |
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908 :pyx import sys |
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909 :pyx print(sys.version) |
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910 < |
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911 *:pyxfile* *python_x-special-comments* |
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912 The `:pyxfile` command works similar to `:pyfile`. However you can add one of |
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913 these comments to force Vim using `:pyfile` or `:py3file`: > |
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914 #!/any string/python2 " Shebang. Must be the first line of the file. |
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915 #!/any string/python3 " Shebang. Must be the first line of the file. |
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916 # requires python 2.x " Maximum lines depend on 'modelines'. |
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917 # requires python 3.x " Maximum lines depend on 'modelines'. |
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918 Unlike normal modelines, the bottom of the file is not checked. |
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919 If none of them are found, the 'pyxversion' setting is used. |
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920 *W20* *W21* |
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921 If Vim does not support the selected Python version a silent message will be |
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922 printed. Use `:messages` to read them. |
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923 |
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924 *:pyxdo* |
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925 The `:pyxdo` command works similar to `:pydo`. |
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926 |
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927 *has-pythonx* |
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928 You can test if pyx* commands are available with: > |
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929 if has('pythonx') |
27903 | 930 echo 'pyx* commands are available. (Python ' .. &pyx .. ')' |
10722
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931 endif |
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932 |
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933 When compiled with only one of |+python| or |+python3|, the has() returns 1. |
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934 When compiled with both |+python| and |+python3|, the test depends on the |
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935 'pyxversion' setting. If 'pyxversion' is 0, it tests Python 3 first, and if |
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936 it is not available then Python 2. If 'pyxversion' is 2 or 3, it tests only |
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937 Python 2 or 3 respectively. |
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938 |
11062 | 939 Note that for `has('pythonx')` to work it may try to dynamically load Python 3 |
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940 or 2. This may have side effects, especially when Vim can only load one of |
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941 the two. |
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942 |
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943 If a user prefers Python 2 and want to fallback to Python 3, he needs to set |
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944 'pyxversion' explicitly in his |.vimrc|. E.g.: > |
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945 if has('python') |
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946 set pyx=2 |
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947 elseif has('python3') |
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948 set pyx=3 |
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949 endif |
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950 |
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951 ============================================================================== |
11160 | 952 12. Building with Python support *python-building* |
953 | |
954 A few hints for building with Python 2 or 3 support. | |
955 | |
956 UNIX | |
957 | |
958 See src/Makefile for how to enable including the Python interface. | |
959 | |
960 On Ubuntu you will want to install these packages for Python 2: | |
961 python | |
962 python-dev | |
963 For Python 3: | |
964 python3 | |
12045 | 965 python3-dev |
11160 | 966 For Python 3.6: |
967 python3.6 | |
12045 | 968 python3.6-dev |
11160 | 969 |
970 If you have more than one version of Python 3, you need to link python3 to the | |
971 one you prefer, before running configure. | |
972 | |
973 ============================================================================== | |
14421 | 974 vim:tw=78:ts=8:noet:ft=help:norl: |