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annotate runtime/doc/if_pyth.txt @ 6717:f242cf1f9897 v7.4.682
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author | Bram Moolenaar <bram@vim.org> |
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date | Tue, 24 Mar 2015 18:22:41 +0100 |
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1 *if_pyth.txt* For Vim version 7.4. Last change: 2014 Jul 23 |
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| |
7 | 19 |
20 {Vi does not have any of these commands} | |
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 |
28 ============================================================================== | |
29 1. Commands *python-commands* | |
30 | |
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31 *:python* *:py* *E263* *E264* *E887* |
7 | 32 :[range]py[thon] {stmt} |
3750 | 33 Execute Python statement {stmt}. A simple check if |
34 the `:python` command is working: > | |
35 :python print "Hello" | |
7 | 36 |
37 :[range]py[thon] << {endmarker} | |
38 {script} | |
39 {endmarker} | |
40 Execute Python script {script}. | |
41 Note: This command doesn't work when the Python | |
42 feature wasn't compiled in. To avoid errors, see | |
43 |script-here|. | |
44 | |
45 {endmarker} must NOT be preceded by any white space. If {endmarker} is | |
46 omitted from after the "<<", a dot '.' must be used after {script}, like | |
47 for the |:append| and |:insert| commands. | |
48 This form of the |:python| command is mainly useful for including python code | |
49 in Vim scripts. | |
50 | |
51 Example: > | |
52 function! IcecreamInitialize() | |
53 python << EOF | |
54 class StrawberryIcecream: | |
55 def __call__(self): | |
56 print 'EAT ME' | |
57 EOF | |
58 endfunction | |
59 < | |
4073 | 60 Note: Python is very sensitive to the indenting. Make sure the "class" line |
61 and "EOF" do not have any indent. | |
7 | 62 |
4435 | 63 *:pydo* |
64 :[range]pydo {body} Execute Python function "def _vim_pydo(line, linenr): | |
65 {body}" for each line in the [range], with the | |
66 function arguments being set to the text of each line | |
67 in turn, without a trailing <EOL>, and the current | |
68 line number. The function should return a string or | |
69 None. If a string is returned, it becomes the text of | |
70 the line in the current turn. The default for [range] | |
71 is the whole file: "1,$". | |
72 {not in Vi} | |
73 | |
74 Examples: | |
75 > | |
76 :pydo return "%s\t%d" % (line[::-1], len(line)) | |
77 :pydo if line: return "%4d: %s" % (linenr, line) | |
78 < | |
7 | 79 *:pyfile* *:pyf* |
80 :[range]pyf[ile] {file} | |
81 Execute the Python script in {file}. The whole | |
82 argument is used as a single file name. {not in Vi} | |
83 | |
84 Both of these commands do essentially the same thing - they execute a piece of | |
85 Python code, with the "current range" |python-range| set to the given line | |
86 range. | |
87 | |
88 In the case of :python, the code to execute is in the command-line. | |
89 In the case of :pyfile, the code to execute is the contents of the given file. | |
90 | |
91 Python commands cannot be used in the |sandbox|. | |
92 | |
93 To pass arguments you need to set sys.argv[] explicitly. Example: > | |
94 | |
95 :python import sys | |
96 :python sys.argv = ["foo", "bar"] | |
97 :pyfile myscript.py | |
98 | |
99 Here are some examples *python-examples* > | |
100 | |
101 :python from vim import * | |
102 :python from string import upper | |
103 :python current.line = upper(current.line) | |
104 :python print "Hello" | |
105 :python str = current.buffer[42] | |
106 | |
107 (Note that changes - like the imports - persist from one command to the next, | |
108 just like in the Python interpreter.) | |
109 | |
110 ============================================================================== | |
111 2. The vim module *python-vim* | |
112 | |
113 Python code gets all of its access to vim (with one exception - see | |
236 | 114 |python-output| below) via the "vim" module. The vim module implements two |
7 | 115 methods, three constants, and one error object. You need to import the vim |
116 module before using it: > | |
117 :python import vim | |
118 | |
119 Overview > | |
20 | 120 :py print "Hello" # displays a message |
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121 :py vim.command(cmd) # execute an Ex command |
20 | 122 :py w = vim.windows[n] # gets window "n" |
123 :py cw = vim.current.window # gets the current window | |
124 :py b = vim.buffers[n] # gets buffer "n" | |
125 :py cb = vim.current.buffer # gets the current buffer | |
126 :py w.height = lines # sets the window height | |
127 :py w.cursor = (row, col) # sets the window cursor position | |
128 :py pos = w.cursor # gets a tuple (row, col) | |
129 :py name = b.name # gets the buffer file name | |
130 :py line = b[n] # gets a line from the buffer | |
131 :py lines = b[n:m] # gets a list of lines | |
132 :py num = len(b) # gets the number of lines | |
133 :py b[n] = str # sets a line in the buffer | |
134 :py b[n:m] = [str1, str2, str3] # sets a number of lines at once | |
135 :py del b[n] # deletes a line | |
136 :py del b[n:m] # deletes a number of lines | |
7 | 137 |
138 | |
139 Methods of the "vim" module | |
140 | |
141 vim.command(str) *python-command* | |
236 | 142 Executes the vim (ex-mode) command str. Returns None. |
7 | 143 Examples: > |
20 | 144 :py vim.command("set tw=72") |
145 :py vim.command("%s/aaa/bbb/g") | |
7 | 146 < The following definition executes Normal mode commands: > |
147 def normal(str): | |
148 vim.command("normal "+str) | |
149 # Note the use of single quotes to delimit a string containing | |
150 # double quotes | |
151 normal('"a2dd"aP') | |
152 < *E659* | |
153 The ":python" command cannot be used recursively with Python 2.2 and | |
154 older. This only works with Python 2.3 and later: > | |
20 | 155 :py vim.command("python print 'Hello again Python'") |
7 | 156 |
157 vim.eval(str) *python-eval* | |
158 Evaluates the expression str using the vim internal expression | |
633 | 159 evaluator (see |expression|). Returns the expression result as: |
160 - a string if the Vim expression evaluates to a string or number | |
161 - a list if the Vim expression evaluates to a Vim list | |
856 | 162 - a dictionary if the Vim expression evaluates to a Vim dictionary |
633 | 163 Dictionaries and lists are recursively expanded. |
7 | 164 Examples: > |
20 | 165 :py text_width = vim.eval("&tw") |
166 :py str = vim.eval("12+12") # NB result is a string! Use | |
7 | 167 # string.atoi() to convert to |
168 # a number. | |
169 | |
856 | 170 :py tagList = vim.eval('taglist("eval_expr")') |
633 | 171 < The latter will return a python list of python dicts, for instance: |
172 [{'cmd': '/^eval_expr(arg, nextcmd)$/', 'static': 0, 'name': | |
173 'eval_expr', 'kind': 'f', 'filename': './src/eval.c'}] | |
174 | |
3682 | 175 vim.bindeval(str) *python-bindeval* |
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176 Like |python-eval|, but returns special objects described in |
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177 |python-bindeval-objects|. These python objects let you modify (|List| |
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178 or |Dictionary|) or call (|Funcref|) vim objects. |
633 | 179 |
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180 vim.strwidth(str) *python-strwidth* |
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181 Like |strwidth()|: returns number of display cells str occupies, tab |
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182 is counted as one cell. |
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183 |
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184 vim.foreach_rtp(callable) *python-foreach_rtp* |
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185 Call the given callable for each path in 'runtimepath' until either |
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186 callable returns something but None, the exception is raised or there |
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187 are no longer paths. If stopped in case callable returned non-None, |
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188 vim.foreach_rtp function returns the value returned by callable. |
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189 |
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190 vim.chdir(*args, **kwargs) *python-chdir* |
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191 vim.fchdir(*args, **kwargs) *python-fchdir* |
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192 Run os.chdir or os.fchdir, then all appropriate vim stuff. |
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193 Note: you should not use these functions directly, use os.chdir and |
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194 os.fchdir instead. Behavior of vim.fchdir is undefined in case |
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195 os.fchdir does not exist. |
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196 |
7 | 197 Error object of the "vim" module |
198 | |
199 vim.error *python-error* | |
200 Upon encountering a Vim error, Python raises an exception of type | |
201 vim.error. | |
202 Example: > | |
203 try: | |
204 vim.command("put a") | |
205 except vim.error: | |
206 # nothing in register a | |
207 | |
208 Constants of the "vim" module | |
209 | |
210 Note that these are not actually constants - you could reassign them. | |
211 But this is silly, as you would then lose access to the vim objects | |
212 to which the variables referred. | |
213 | |
214 vim.buffers *python-buffers* | |
4393 | 215 A mapping object providing access to the list of vim buffers. The |
7 | 216 object supports the following operations: > |
20 | 217 :py b = vim.buffers[i] # Indexing (read-only) |
218 :py b in vim.buffers # Membership test | |
219 :py n = len(vim.buffers) # Number of elements | |
4397 | 220 :py for b in vim.buffers: # Iterating over buffer list |
7 | 221 < |
222 vim.windows *python-windows* | |
236 | 223 A sequence object providing access to the list of vim windows. The |
7 | 224 object supports the following operations: > |
20 | 225 :py w = vim.windows[i] # Indexing (read-only) |
226 :py w in vim.windows # Membership test | |
227 :py n = len(vim.windows) # Number of elements | |
228 :py for w in vim.windows: # Sequential access | |
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229 < Note: vim.windows object always accesses current tab page. |
4401 | 230 |python-tabpage|.windows objects are bound to parent |python-tabpage| |
231 object and always use windows from that tab page (or throw vim.error | |
232 in case tab page was deleted). You can keep a reference to both | |
233 without keeping a reference to vim module object or |python-tabpage|, | |
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234 they will not lose their properties in this case. |
4401 | 235 |
236 vim.tabpages *python-tabpages* | |
237 A sequence object providing access to the list of vim tab pages. The | |
238 object supports the following operations: > | |
239 :py t = vim.tabpages[i] # Indexing (read-only) | |
240 :py t in vim.tabpages # Membership test | |
241 :py n = len(vim.tabpages) # Number of elements | |
242 :py for t in vim.tabpages: # Sequential access | |
7 | 243 < |
244 vim.current *python-current* | |
245 An object providing access (via specific attributes) to various | |
246 "current" objects available in vim: | |
247 vim.current.line The current line (RW) String | |
4407 | 248 vim.current.buffer The current buffer (RW) Buffer |
249 vim.current.window The current window (RW) Window | |
250 vim.current.tabpage The current tab page (RW) TabPage | |
7 | 251 vim.current.range The current line range (RO) Range |
252 | |
236 | 253 The last case deserves a little explanation. When the :python or |
7 | 254 :pyfile command specifies a range, this range of lines becomes the |
236 | 255 "current range". A range is a bit like a buffer, but with all access |
256 restricted to a subset of lines. See |python-range| for more details. | |
7 | 257 |
4407 | 258 Note: When assigning to vim.current.{buffer,window,tabpage} it expects |
259 valid |python-buffer|, |python-window| or |python-tabpage| objects | |
260 respectively. Assigning triggers normal (with |autocommand|s) | |
261 switching to given buffer, window or tab page. It is the only way to | |
262 switch UI objects in python: you can't assign to | |
263 |python-tabpage|.window attribute. To switch without triggering | |
264 autocommands use > | |
265 py << EOF | |
266 saved_eventignore = vim.options['eventignore'] | |
267 vim.options['eventignore'] = 'all' | |
268 try: | |
269 vim.current.buffer = vim.buffers[2] # Switch to buffer 2 | |
270 finally: | |
271 vim.options['eventignore'] = saved_eventignore | |
272 EOF | |
273 < | |
4323 | 274 vim.vars *python-vars* |
275 vim.vvars *python-vvars* | |
276 Dictionary-like objects holding dictionaries with global (|g:|) and | |
277 vim (|v:|) variables respectively. Identical to `vim.bindeval("g:")`, | |
278 but faster. | |
7 | 279 |
4350 | 280 vim.options *python-options* |
281 Object partly supporting mapping protocol (supports setting and | |
282 getting items) providing a read-write access to global options. | |
283 Note: unlike |:set| this provides access only to global options. You | |
284 cannot use this object to obtain or set local options' values or | |
285 access local-only options in any fashion. Raises KeyError if no global | |
286 option with such name exists (i.e. does not raise KeyError for | |
287 |global-local| options and global only options, but does for window- | |
288 and buffer-local ones). Use |python-buffer| objects to access to | |
289 buffer-local options and |python-window| objects to access to | |
290 window-local options. | |
291 | |
4496 | 292 Type of this object is available via "Options" attribute of vim |
293 module. | |
294 | |
7 | 295 Output from Python *python-output* |
296 Vim displays all Python code output in the Vim message area. Normal | |
297 output appears as information messages, and error output appears as | |
298 error messages. | |
299 | |
300 In implementation terms, this means that all output to sys.stdout | |
301 (including the output from print statements) appears as information | |
302 messages, and all output to sys.stderr (including error tracebacks) | |
303 appears as error messages. | |
304 | |
305 *python-input* | |
306 Input (via sys.stdin, including input() and raw_input()) is not | |
236 | 307 supported, and may cause the program to crash. This should probably be |
7 | 308 fixed. |
309 | |
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310 *python2-directory* *python3-directory* *pythonx-directory* |
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311 Python 'runtimepath' handling *python-special-path* |
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312 |
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313 In python vim.VIM_SPECIAL_PATH special directory is used as a replacement for |
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314 the list of paths found in 'runtimepath': with this directory in sys.path and |
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315 vim.path_hooks in sys.path_hooks python will try to load module from |
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316 {rtp}/python2 (or python3) and {rtp}/pythonx (for both python versions) for |
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317 each {rtp} found in 'runtimepath'. |
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318 |
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319 Implementation is similar to the following, but written in C: > |
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320 |
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321 from imp import find_module, load_module |
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322 import vim |
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323 import sys |
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324 |
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325 class VimModuleLoader(object): |
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326 def __init__(self, module): |
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327 self.module = module |
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328 |
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329 def load_module(self, fullname, path=None): |
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330 return self.module |
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331 |
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332 def _find_module(fullname, oldtail, path): |
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333 idx = oldtail.find('.') |
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334 if idx > 0: |
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335 name = oldtail[:idx] |
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336 tail = oldtail[idx+1:] |
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337 fmr = find_module(name, path) |
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338 module = load_module(fullname[:-len(oldtail)] + name, *fmr) |
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339 return _find_module(fullname, tail, module.__path__) |
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340 else: |
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341 fmr = find_module(fullname, path) |
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342 return load_module(fullname, *fmr) |
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343 |
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344 # It uses vim module itself in place of VimPathFinder class: it does not |
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345 # matter for python which object has find_module function attached to as |
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346 # an attribute. |
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347 class VimPathFinder(object): |
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348 @classmethod |
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349 def find_module(cls, fullname, path=None): |
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350 try: |
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351 return VimModuleLoader(_find_module(fullname, fullname, path or vim._get_paths())) |
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352 except ImportError: |
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353 return None |
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354 |
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355 @classmethod |
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356 def load_module(cls, fullname, path=None): |
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357 return _find_module(fullname, fullname, path or vim._get_paths()) |
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358 |
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359 def hook(path): |
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360 if path == vim.VIM_SPECIAL_PATH: |
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361 return VimPathFinder |
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362 else: |
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363 raise ImportError |
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364 |
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365 sys.path_hooks.append(hook) |
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366 |
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367 vim.VIM_SPECIAL_PATH *python-VIM_SPECIAL_PATH* |
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368 String constant used in conjunction with vim path hook. If path hook |
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369 installed by vim is requested to handle anything but path equal to |
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370 vim.VIM_SPECIAL_PATH constant it raises ImportError. In the only other |
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371 case it uses special loader. |
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372 |
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373 Note: you must not use value of this constant directly, always use |
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374 vim.VIM_SPECIAL_PATH object. |
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375 |
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376 vim.find_module(...) *python-find_module* |
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377 vim.path_hook(path) *python-path_hook* |
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378 Methods or objects used to implement path loading as described above. |
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379 You should not be using any of these directly except for vim.path_hook |
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380 in case you need to do something with sys.meta_path. It is not |
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381 guaranteed that any of the objects will exist in the future vim |
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382 versions. |
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383 |
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384 vim._get_paths *python-_get_paths* |
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385 Methods returning a list of paths which will be searched for by path |
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386 hook. You should not rely on this method being present in future |
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387 versions, but can use it for debugging. |
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388 |
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389 It returns a list of {rtp}/python2 (or {rtp}/python3) and |
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390 {rtp}/pythonx directories for each {rtp} in 'runtimepath'. |
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391 |
7 | 392 ============================================================================== |
393 3. Buffer objects *python-buffer* | |
394 | |
236 | 395 Buffer objects represent vim buffers. You can obtain them in a number of ways: |
7 | 396 - via vim.current.buffer (|python-current|) |
397 - from indexing vim.buffers (|python-buffers|) | |
398 - from the "buffer" attribute of a window (|python-window|) | |
399 | |
3312 | 400 Buffer objects have two read-only attributes - name - the full file name for |
401 the buffer, and number - the buffer number. They also have three methods | |
402 (append, mark, and range; see below). | |
7 | 403 |
236 | 404 You can also treat buffer objects as sequence objects. In this context, they |
7 | 405 act as if they were lists (yes, they are mutable) of strings, with each |
236 | 406 element being a line of the buffer. All of the usual sequence operations, |
7 | 407 including indexing, index assignment, slicing and slice assignment, work as |
236 | 408 you would expect. Note that the result of indexing (slicing) a buffer is a |
409 string (list of strings). This has one unusual consequence - b[:] is different | |
410 from b. In particular, "b[:] = None" deletes the whole of the buffer, whereas | |
7 | 411 "b = None" merely updates the variable b, with no effect on the buffer. |
412 | |
236 | 413 Buffer indexes start at zero, as is normal in Python. This differs from vim |
414 line numbers, which start from 1. This is particularly relevant when dealing | |
7 | 415 with marks (see below) which use vim line numbers. |
416 | |
4350 | 417 The buffer object attributes are: |
418 b.vars Dictionary-like object used to access | |
419 |buffer-variable|s. | |
420 b.options Mapping object (supports item getting, setting and | |
421 deleting) that provides access to buffer-local options | |
422 and buffer-local values of |global-local| options. Use | |
423 |python-window|.options if option is window-local, | |
424 this object will raise KeyError. If option is | |
425 |global-local| and local value is missing getting it | |
426 will return None. | |
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427 b.name String, RW. Contains buffer name (full path). |
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428 Note: when assigning to b.name |BufFilePre| and |
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429 |BufFilePost| autocommands are launched. |
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430 b.number Buffer number. Can be used as |python-buffers| key. |
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431 Read-only. |
4780 | 432 b.valid True or False. Buffer object becomes invalid when |
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433 corresponding buffer is wiped out. |
4350 | 434 |
7 | 435 The buffer object methods are: |
436 b.append(str) Append a line to the buffer | |
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437 b.append(str, nr) Idem, below line "nr" |
7 | 438 b.append(list) Append a list of lines to the buffer |
439 Note that the option of supplying a list of strings to | |
440 the append method differs from the equivalent method | |
441 for Python's built-in list objects. | |
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442 b.append(list, nr) Idem, below line "nr" |
7 | 443 b.mark(name) Return a tuple (row,col) representing the position |
444 of the named mark (can also get the []"<> marks) | |
445 b.range(s,e) Return a range object (see |python-range|) which | |
446 represents the part of the given buffer between line | |
447 numbers s and e |inclusive|. | |
448 | |
20 | 449 Note that when adding a line it must not contain a line break character '\n'. |
450 A trailing '\n' is allowed and ignored, so that you can do: > | |
451 :py b.append(f.readlines()) | |
452 | |
4496 | 453 Buffer object type is available using "Buffer" attribute of vim module. |
454 | |
7 | 455 Examples (assume b is the current buffer) > |
20 | 456 :py print b.name # write the buffer file name |
457 :py b[0] = "hello!!!" # replace the top line | |
458 :py b[:] = None # delete the whole buffer | |
459 :py del b[:] # delete the whole buffer | |
460 :py b[0:0] = [ "a line" ] # add a line at the top | |
461 :py del b[2] # delete a line (the third) | |
462 :py b.append("bottom") # add a line at the bottom | |
463 :py n = len(b) # number of lines | |
464 :py (row,col) = b.mark('a') # named mark | |
465 :py r = b.range(1,5) # a sub-range of the buffer | |
4323 | 466 :py b.vars["foo"] = "bar" # assign b:foo variable |
4350 | 467 :py b.options["ff"] = "dos" # set fileformat |
468 :py del b.options["ar"] # same as :set autoread< | |
7 | 469 |
470 ============================================================================== | |
471 4. Range objects *python-range* | |
472 | |
236 | 473 Range objects represent a part of a vim buffer. You can obtain them in a |
7 | 474 number of ways: |
475 - via vim.current.range (|python-current|) | |
476 - from a buffer's range() method (|python-buffer|) | |
477 | |
236 | 478 A range object is almost identical in operation to a buffer object. However, |
7 | 479 all operations are restricted to the lines within the range (this line range |
480 can, of course, change as a result of slice assignments, line deletions, or | |
481 the range.append() method). | |
482 | |
483 The range object attributes are: | |
484 r.start Index of first line into the buffer | |
485 r.end Index of last line into the buffer | |
486 | |
487 The range object methods are: | |
488 r.append(str) Append a line to the range | |
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489 r.append(str, nr) Idem, after line "nr" |
7 | 490 r.append(list) Append a list of lines to the range |
491 Note that the option of supplying a list of strings to | |
492 the append method differs from the equivalent method | |
493 for Python's built-in list objects. | |
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494 r.append(list, nr) Idem, after line "nr" |
7 | 495 |
4496 | 496 Range object type is available using "Range" attribute of vim module. |
497 | |
7 | 498 Example (assume r is the current range): |
499 # Send all lines in a range to the default printer | |
500 vim.command("%d,%dhardcopy!" % (r.start+1,r.end+1)) | |
501 | |
502 ============================================================================== | |
503 5. Window objects *python-window* | |
504 | |
236 | 505 Window objects represent vim windows. You can obtain them in a number of ways: |
7 | 506 - via vim.current.window (|python-current|) |
507 - from indexing vim.windows (|python-windows|) | |
4401 | 508 - from indexing "windows" attribute of a tab page (|python-tabpage|) |
509 - from the "window" attribute of a tab page (|python-tabpage|) | |
7 | 510 |
236 | 511 You can manipulate window objects only through their attributes. They have no |
7 | 512 methods, and no sequence or other interface. |
513 | |
514 Window attributes are: | |
515 buffer (read-only) The buffer displayed in this window | |
516 cursor (read-write) The current cursor position in the window | |
517 This is a tuple, (row,col). | |
518 height (read-write) The window height, in rows | |
519 width (read-write) The window width, in columns | |
4323 | 520 vars (read-only) The window |w:| variables. Attribute is |
521 unassignable, but you can change window | |
522 variables this way | |
4350 | 523 options (read-only) The window-local options. Attribute is |
524 unassignable, but you can change window | |
525 options this way. Provides access only to | |
526 window-local options, for buffer-local use | |
527 |python-buffer| and for global ones use | |
528 |python-options|. If option is |global-local| | |
529 and local value is missing getting it will | |
530 return None. | |
4379 | 531 number (read-only) Window number. The first window has number 1. |
532 This is zero in case it cannot be determined | |
533 (e.g. when the window object belongs to other | |
534 tab page). | |
4431 | 535 row, col (read-only) On-screen window position in display cells. |
4383 | 536 First position is zero. |
4431 | 537 tabpage (read-only) Window tab page. |
4780 | 538 valid (read-write) True or False. Window object becomes invalid |
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539 when corresponding window is closed. |
4383 | 540 |
7 | 541 The height attribute is writable only if the screen is split horizontally. |
542 The width attribute is writable only if the screen is split vertically. | |
543 | |
4496 | 544 Window object type is available using "Window" attribute of vim module. |
545 | |
7 | 546 ============================================================================== |
4401 | 547 6. Tab page objects *python-tabpage* |
548 | |
549 Tab page objects represent vim tab pages. You can obtain them in a number of | |
550 ways: | |
551 - via vim.current.tabpage (|python-current|) | |
552 - from indexing vim.tabpages (|python-tabpages|) | |
553 | |
554 You can use this object to access tab page windows. They have no methods and | |
555 no sequence or other interfaces. | |
556 | |
557 Tab page attributes are: | |
558 number The tab page number like the one returned by | |
559 |tabpagenr()|. | |
560 windows Like |python-windows|, but for current tab page. | |
561 vars The tab page |t:| variables. | |
562 window Current tabpage window. | |
4780 | 563 valid True or False. Tab page object becomes invalid when |
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564 corresponding tab page is closed. |
4401 | 565 |
4496 | 566 TabPage object type is available using "TabPage" attribute of vim module. |
567 | |
4401 | 568 ============================================================================== |
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569 7. vim.bindeval objects *python-bindeval-objects* |
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570 |
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571 vim.Dictionary object *python-Dictionary* |
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572 Dictionary-like object providing access to vim |Dictionary| type. |
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573 Attributes: |
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574 Attribute Description ~ |
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575 locked One of *python-.locked* |
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576 Value Description ~ |
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577 zero Variable is not locked |
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578 vim.VAR_LOCKED Variable is locked, but can be unlocked |
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579 vim.VAR_FIXED Variable is locked and can't be unlocked |
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580 Read-write. You can unlock locked variable by assigning |
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581 `True` or `False` to this attribute. No recursive locking |
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582 is supported. |
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583 scope One of |
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584 Value Description ~ |
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585 zero Dictionary is not a scope one |
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586 vim.VAR_DEF_SCOPE |g:| or |l:| dictionary |
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587 vim.VAR_SCOPE Other scope dictionary, |
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588 see |internal-variables| |
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589 Methods (note: methods do not support keyword arguments): |
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590 Method Description ~ |
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591 keys() Returns a list with dictionary keys. |
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592 values() Returns a list with dictionary values. |
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593 items() Returns a list of 2-tuples with dictionary contents. |
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594 update(iterable), update(dictionary), update(**kwargs) |
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595 Adds keys to dictionary. |
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596 get(key[, default=None]) |
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597 Obtain key from dictionary, returning the default if it is |
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598 not present. |
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599 pop(key[, default]) |
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600 Remove specified key from dictionary and return |
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601 corresponding value. If key is not found and default is |
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602 given returns the default, otherwise raises KeyError. |
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603 popitem() |
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604 Remove random key from dictionary and return (key, value) |
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605 pair. |
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606 has_key(key) |
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607 Check whether dictionary contains specified key, similar |
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608 to `key in dict`. |
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609 |
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610 __new__(), __new__(iterable), __new__(dictionary), __new__(update) |
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611 You can use `vim.Dictionary()` to create new vim |
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612 dictionaries. `d=vim.Dictionary(arg)` is the same as |
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613 `d=vim.bindeval('{}');d.update(arg)`. Without arguments |
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614 constructs empty dictionary. |
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615 |
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616 Examples: > |
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617 d = vim.Dictionary(food="bar") # Constructor |
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618 d['a'] = 'b' # Item assignment |
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619 print d['a'] # getting item |
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620 d.update({'c': 'd'}) # .update(dictionary) |
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621 d.update(e='f') # .update(**kwargs) |
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622 d.update((('g', 'h'), ('i', 'j'))) # .update(iterable) |
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623 for key in d.keys(): # .keys() |
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624 for val in d.values(): # .values() |
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625 for key, val in d.items(): # .items() |
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626 print isinstance(d, vim.Dictionary) # True |
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627 for key in d: # Iteration over keys |
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628 class Dict(vim.Dictionary): # Subclassing |
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629 < |
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630 Note: when iterating over keys you should not modify dictionary. |
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631 |
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632 vim.List object *python-List* |
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633 Sequence-like object providing access to vim |List| type. |
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634 Supports `.locked` attribute, see |python-.locked|. Also supports the |
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635 following methods: |
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636 Method Description ~ |
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637 extend(item) Add items to the list. |
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638 |
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639 __new__(), __new__(iterable) |
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640 You can use `vim.List()` to create new vim lists. |
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641 `l=vim.List(iterable)` is the same as |
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642 `l=vim.bindeval('[]');l.extend(iterable)`. Without |
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643 arguments constructs empty list. |
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644 Examples: > |
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645 l = vim.List("abc") # Constructor, result: ['a', 'b', 'c'] |
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646 l.extend(['abc', 'def']) # .extend() method |
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647 print l[1:] # slicing |
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648 l[:0] = ['ghi', 'jkl'] # slice assignment |
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649 print l[0] # getting item |
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650 l[0] = 'mno' # assignment |
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651 for i in l: # iteration |
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652 print isinstance(l, vim.List) # True |
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653 class List(vim.List): # Subclassing |
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654 |
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655 vim.Function object *python-Function* |
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656 Function-like object, acting like vim |Funcref| object. Supports `.name` |
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657 attribute and is callable. Accepts special keyword argument `self`, see |
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658 |Dictionary-function|. You can also use `vim.Function(name)` constructor, |
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659 it is the same as `vim.bindeval('function(%s)'%json.dumps(name))`. |
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660 |
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661 Examples: > |
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662 f = vim.Function('tr') # Constructor |
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663 print f('abc', 'a', 'b') # Calls tr('abc', 'a', 'b') |
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664 vim.command(''' |
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665 function DictFun() dict |
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666 return self |
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667 endfunction |
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668 ''') |
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669 f = vim.bindeval('function("DictFun")') |
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670 print f(self={}) # Like call('DictFun', [], {}) |
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671 print isinstance(f, vim.Function) # True |
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672 |
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673 ============================================================================== |
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674 8. pyeval() and py3eval() Vim functions *python-pyeval* |
3682 | 675 |
676 To facilitate bi-directional interface, you can use |pyeval()| and |py3eval()| | |
677 functions to evaluate Python expressions and pass their values to VimL. | |
678 | |
679 ============================================================================== | |
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680 9. Dynamic loading *python-dynamic* |
557 | 681 |
682 On MS-Windows the Python library can be loaded dynamically. The |:version| | |
683 output then includes |+python/dyn|. | |
684 | |
685 This means that Vim will search for the Python DLL file only when needed. | |
686 When you don't use the Python interface you don't need it, thus you can use | |
687 Vim without this DLL file. | |
688 | |
689 To use the Python interface the Python DLL must be in your search path. In a | |
690 console window type "path" to see what directories are used. | |
691 | |
692 The name of the DLL must match the Python version Vim was compiled with. | |
693 Currently the name is "python24.dll". That is for Python 2.4. To know for | |
694 sure edit "gvim.exe" and search for "python\d*.dll\c". | |
695 | |
696 ============================================================================== | |
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697 10. Python 3 *python3* |
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698 |
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699 *:py3* *:python3* |
4435 | 700 The `:py3` and `:python3` commands work similar to `:python`. A simple check |
4098 | 701 if the `:py3` command is working: > |
3750 | 702 :py3 print("Hello") |
703 < *:py3file* | |
4435 | 704 The `:py3file` command works similar to `:pyfile`. |
4431 | 705 *:py3do* *E863* |
4435 | 706 The `:py3do` command works similar to `:pydo`. |
4417 | 707 |
3682 | 708 |
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709 Vim can be built in four ways (:version output): |
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710 1. No Python support (-python, -python3) |
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711 2. Python 2 support only (+python or +python/dyn, -python3) |
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712 3. Python 3 support only (-python, +python3 or +python3/dyn) |
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713 4. Python 2 and 3 support (+python/dyn, +python3/dyn) |
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714 |
5220 | 715 Some more details on the special case 4: *python-2-and-3* |
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716 |
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717 When Python 2 and Python 3 are both supported they must be loaded dynamically. |
2540 | 718 |
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719 When doing this on Linux/Unix systems and importing global symbols, this leads |
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720 to a crash when the second Python version is used. So either global symbols |
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721 are loaded but only one Python version is activated, or no global symbols are |
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Updated runtime files and translations.
Bram Moolenaar <bram@vim.org>
parents:
2577
diff
changeset
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722 loaded. The latter makes Python's "import" fail on libraries that expect the |
2560
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
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|
723 symbols to be provided by Vim. |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
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|
724 *E836* *E837* |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
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|
725 Vim's configuration script makes a guess for all libraries based on one |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
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|
726 standard Python library (termios). If importing this library succeeds for |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
changeset
|
727 both Python versions, then both will be made available in Vim at the same |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
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|
728 time. If not, only the version first used in a session will be enabled. |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
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|
729 When trying to use the other one you will get the E836 or E837 error message. |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
changeset
|
730 |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
changeset
|
731 Here Vim's behavior depends on the system in which it was configured. In a |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
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|
732 system where both versions of Python were configured with --enable-shared, |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
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|
733 both versions of Python will be activated at the same time. There will still |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
changeset
|
734 be problems with other third party libraries that were not linked to |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
changeset
|
735 libPython. |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
changeset
|
736 |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
changeset
|
737 To work around such problems there are these options: |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
changeset
|
738 1. The problematic library is recompiled to link to the according |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
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|
739 libpython.so. |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
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|
740 2. Vim is recompiled for only one Python version. |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
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|
741 3. You undefine PY_NO_RTLD_GLOBAL in auto/config.h after configuration. This |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
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diff
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|
742 may crash Vim though. |
84ba6293f9d7
Preparations for 7.3f release.
Bram Moolenaar <bram@vim.org>
parents:
2554
diff
changeset
|
743 |
5088
34c629c3b4ba
updated for version 7.3.1287
Bram Moolenaar <bram@vim.org>
parents:
5055
diff
changeset
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744 *E880* |
34c629c3b4ba
updated for version 7.3.1287
Bram Moolenaar <bram@vim.org>
parents:
5055
diff
changeset
|
745 Raising SystemExit exception in python isn't endorsed way to quit vim, use: > |
34c629c3b4ba
updated for version 7.3.1287
Bram Moolenaar <bram@vim.org>
parents:
5055
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|
746 :py vim.command("qall!") |
34c629c3b4ba
updated for version 7.3.1287
Bram Moolenaar <bram@vim.org>
parents:
5055
diff
changeset
|
747 < |
34c629c3b4ba
updated for version 7.3.1287
Bram Moolenaar <bram@vim.org>
parents:
5055
diff
changeset
|
748 |
2826 | 749 *has-python* |
750 You can test what Python version is available with: > | |
751 if has('python') | |
3082 | 752 echo 'there is Python 2.x' |
2826 | 753 elseif has('python3') |
754 echo 'there is Python 3.x' | |
755 endif | |
756 | |
757 Note however, that when Python 2 and 3 are both available and loaded | |
758 dynamically, these has() calls will try to load them. If only one can be | |
759 loaded at a time, just checking if Python 2 or 3 are available will prevent | |
760 the other one from being available. | |
2340
99c1eba60b2d
Make automatic prototype generation work with more interfaces.
Bram Moolenaar <bram@vim.org>
parents:
2154
diff
changeset
|
761 |
99c1eba60b2d
Make automatic prototype generation work with more interfaces.
Bram Moolenaar <bram@vim.org>
parents:
2154
diff
changeset
|
762 ============================================================================== |
7 | 763 vim:tw=78:ts=8:ft=help:norl: |