New submission from Paul Pinterits email@example.com:
The documentation of the typing module explains how to instantiate generic types, but there is no information about how to extract the type arguments from a generic type.
list_of_ints = typing.List[int]
# how do we get <class 'int'> out of list_of_ints? list_of_ints.???
Through trial and error I've discovered list_of_ints.__args__, which *seems* to be what I'm looking for, but since it's never mentioned in the docs, it's unclear whether this __args__ attribute is an implementation detail or not.
Please document the official/intended way to extract type arguments from a Generic.
---------- assignee: docs@python components: Documentation messages: 311520 nosy: Paul Pinterits, docs@python priority: normal severity: normal status: open title: no information about accessing typing.Generic type arguments type: enhancement versions: Python 3.5, Python 3.6