Function mypy_list_typing

tests/test_typing.py:96–110

()

@pytest.mark.mypy_testing
def mypy_list_typing() -> None:
    class T(HasTraits):
        latex_command = List(
            ["xelatex", "{filename}", "-quiet"], help="Shell command used to compile latex."
        ).tag(config=True)

    t = T()
    reveal_type(List(["foo"]))  # R: traitlets.traitlets.List[builtins.str]
    reveal_type(List([""]).tag(sync=True))  # R: traitlets.traitlets.List[builtins.str]
    reveal_type(List(None, allow_none=True))  # R: traitlets.traitlets.List[Never]
    reveal_type(
        List(None, allow_none=True).tag(sync=True)  # R: traitlets.traitlets.List[Never]
    )
    reveal_type(T.latex_command)  # R: traitlets.traitlets.List[builtins.str]
    reveal_type(t.latex_command)  # R: builtins.list[builtins.str]


@pytest.mark.mypy_testing