Shantanu <hauntsani...@gmail.com> added the comment:
My implementation in PR 22848 turns callable into a type and uses `__new__`. It isn't too bad. It does appear to affect performance of callable though. Here's some data on how often typing imports are used. This is the number of files in which `from typing import X` is present in mypy_primer's corpus (searched using the AST). My read of this is that Callable is meaningfully more used than anything else in collections.abc. ``` 'Optional': 2563 'Any': 2402 'List': 2383 'Dict': 2150 'Tuple': 1592 'Union': 1269 'Callable': 1058 'Iterable': 609 'Set': 580 'cast': 505 'Sequence': 465 'Type': 438 'Iterator': 385 'TYPE_CHECKING': 357 'TypeVar': 302 'Mapping': 301 'Generator': 194 'NamedTuple': 138 'Text': 127 'IO': 120 'Awaitable': 116 ... ``` ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue42102> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
