eval_type_backport_modern_type_hint_syntax_on_older_python.py

1from eval_type_backport import eval_type_backport
2
3# On Python 3.9, eval_type_backport allows using Python 3.10+ syntax
4# like the | operator for Unions and lowercase list/dict for generics.
5hint = "int | list[str]"
6globalns = {}
7localns = {}
8
9# This evaluates the string into a valid type object
10result = eval_type_backport(hint, globalns, localns)
11
12print(result)
13# Output on Python 3.9: typing.Union[int, typing.List[str]]