Question

我将mypy及其依赖项下载并安装到名为lib的文件夹中（与mypy分开，其他库也位于其中）：

pip install --upgrade --target=. mypy
Collecting mypy
  Using cached mypy-0.790-cp37-cp37m-win_amd64.whl (8.5 MB)
Collecting mypy-extensions<0.5.0,>=0.4.3
  Using cached mypy_extensions-0.4.3-py2.py3-none-any.whl (4.5 kB)
Collecting typed-ast<1.5.0,>=1.4.0
  Using cached typed_ast-1.4.1-cp37-cp37m-win_amd64.whl (155 kB)
Collecting typing-extensions>=3.7.4
  Using cached typing_extensions-3.7.4.3-py3-none-any.whl (22 kB)
Installing collected packages: mypy-extensions, typed-ast, typing-extensions, mypy
Successfully installed mypy-0.790 mypy-extensions-0.4.3 typed-ast-1.4.1 typing-extensions-3.7.4.3

我想用mypy分析一个文件，该文件从另一个目录（即我安装mypy的lib模块）中导入模块。因此，为了遵循导入，我设置了MYPYPATH变量以保存lib目录的路径：

set MYPYPATH=path_to_lib

现在，如果执行mypy，我将收到一个错误，提示““ typing_extensions.py”遮蔽库模块“ typing_extensions”“：

mypy --namespace-packages script_to_check.py
mypy: "path_to_lib\typing_extensions.py" shadows library module "typing_extensions"
note: A user-defined top-level module with name "typing_extensions" is not supported

typing_extensions实际上是由mypy安装的，现在它告诉我它不能使用该软件包！？

如果我将pyth_to_lib中的typing_extensions.py重命名为_typing_extensions.py，则会收到错误消息，提示mypy无法导入type_extensions：

mypy --namespace-packages ng_gen_igxl_tp.py
Traceback (most recent call last):
  File "c:\software\anaconda3\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\software\anaconda3\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "path_to_lib\bin\mypy.exe\__main__.py", line 4, in <module>
  File "path_to_lib\mypy\__main__.py", line 4, in <module>
    from mypy.main import main
  File "mypy\main.py", line 11, in <module>
ModuleNotFoundError: No module named 'typing_extensions'

如何让mypy运行？

Answer 1

经过进一步调查，我在评论中已经提到的事实是正确的：It is not possible to include the directory where mypy is installed in MYPYPATH。
我最终创建了一个虚拟环境并在其中安装了mypy-首先我们应该这样做-现在一切都按预期运行。

安装Mypy会导致“阴影库模块”-错误

1 个答案: