start:
[1, 'as''d', [1, 2, function('strlen')], {'a': 1}]
{'a': 1}
1
Vim(put):E684: 
101101
{'1': 'asd', 'b': [1, 2, function('strlen')], '-1': {'a': 1}}asd
['-1', '1', 'b']
['asd', [1, 2, function('strlen')], {'a': 1}]
1:'asd'
b:[1, 2, function('strlen')]
-1:{'a': 1}
Vim(call):E737: 3
{'c': 'ccc', '1': 99, 'b': [1, 2, function('strlen')], '3': 33, '-1': {'a': 1}}
{'c': 'ccc', '1': 99, '3': 33, '-1': {'a': 1}}
101101
Vim(let):E706: d
Vim(let):E706: l
[1, 'as''d', {'a': 1}]
[4]
{'1': 99, '3': 33}
3000 2900 2001 1600 1501
Vim(let):E716: 1500
NONE 2999
33=999
{'33': 999}
len: 3
again: 3
Vim(call):E725: 
g:dict.func-4
a:function('3')
Vim(let):E698: