预期类型'Union[ type，Tuple[Union[type，Tuple[Any，.]，.]‘，得到'Tuple[ImgDirs，ImgDirs，ImgDirs]’

Question

Python3.8.5

def delete_catalogue_from_media(instance,
                                file_type: Union[general.ImgDirs.RASTER,
                                                 general.ImgDirs.SVG,
                                                 general.ImgDirs.FAV]) -> None:
    # //@formatter:off
    # Assertions {
    assert isinstance(file_type, (general.ImgDirs.RASTER, general.ImgDirs.SVG, general.ImgDirs.FAV))
    # } Assertions
    # //@formatter:on

问题

IDE ( 2020.3)显示了mysmatch类型的错误。

Expected type 'Union[type, Tuple[Union[type, Tuple[Any, ...]], ...]]', got 'Tuple[ImgDirs, ImgDirs, ImgDirs]' instead 
 Inspection info: This inspection detects type errors in function call expressions. Due to dynamic dispatch and duck typing, this is possible in a limited but useful number of cases. Types of function parameters can be specified in docstrings or in Python 3 function annotations.

你能帮我纠正一下吗？

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Answer 1

PyCharm抱怨(general.ImgDirs.RASTER, ...)不符合isinstance的预期签名，后者如果由Union[type, Tuple[Any, ...]]组成，则接受元组。

否则，我们需要更多关于general.ImgDirs中的内容的详细信息:它们是类、来自typing模块的继承还是一些基本类型的组合？