setuptools是干嘛用的？为什么报错总是因为它？

网络：DLNR
环境：win10+pytorch

conda list
setuptools                65.0.0                   pypi_0    pypi
typing-extensions         4.6.0                    pypi_0    pypi

通过实验试出是setuptools版本太高，但不知道为什么？报错如下，哪位同志看到知道可留言讨论下~~~
ps.很多其他的报错也是setuptools版本太高引起的，一直不知道为什么~ 留个坑先~

C:\Users\26735\anaconda3\envs\pytorch\python.exe D:/DLNR/train_stereo.py
Traceback (most recent call last):
  File "C:\Users\26735\anaconda3\envs\pytorch\lib\site-packages\setuptools\_vendor\importlib_metadata\_compat.py", line 9, in <module>
    from typing import Protocol
ImportError: cannot import name 'Protocol' from 'typing' (C:\Users\26735\anaconda3\envs\pytorch\lib\typing.py)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "D:DLNR/train_stereo.py", line 9, in <module>
    from torch.utils.tensorboard import SummaryWriter
  File "C:\Users\26735\anaconda3\envs\pytorch\lib\site-packages\torch\utils\tensorboard\__init__.py", line 2, in <module>
    from setuptools import distutils
  File "C:\Users\26735\anaconda3\envs\pytorch\lib\site-packages\setuptools\__init__.py", line 18, in <module>
    from setuptools.dist import Distribution
  File "C:\Users\26735\anaconda3\envs\pytorch\lib\site-packages\setuptools\dist.py", line 34, in <module>
    from ._importlib import metadata
  File "C:\Users\26735\anaconda3\envs\pytorch\lib\site-packages\setuptools\_importlib.py", line 38, in <module>
    from setuptools.extern import importlib_metadata as metadata
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 670, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 583, in module_from_spec
  File "C:\Users\26735\anaconda3\envs\pytorch\lib\site-packages\setuptools\extern\__init__.py", line 52, in create_module
    return self.load_module(spec.name)
  File "C:\Users\26735\anaconda3\envs\pytorch\lib\site-packages\setuptools\extern\__init__.py", line 37, in load_module
    __import__(extant)
  File "C:\Users\26735\anaconda3\envs\pytorch\lib\site-packages\setuptools\_vendor\importlib_metadata\__init__.py", line 17, in <module>
    from . import _adapters, _meta
  File "C:\Users\26735\anaconda3\envs\pytorch\lib\site-packages\setuptools\_vendor\importlib_metadata\_meta.py", line 1, in <module>
    from ._compat import Protocol
  File "C:\Users\26735\anaconda3\envs\pytorch\lib\site-packages\setuptools\_vendor\importlib_metadata\_compat.py", line 11, in <module>
    from ..typing_extensions import Protocol  # type: ignore
  File "C:\Users\26735\anaconda3\envs\pytorch\lib\site-packages\setuptools\_vendor\typing_extensions.py", line 416, in <module>
    extra=collections.OrderedDict):
TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases

Process finished with exit code 1

File "C:\Users\26735\anaconda3\envs\pytorch\lib\site-packages\setuptools\_vendor\typing_extensions.py", line 416, in <module>
    extra=collections.OrderedDict):
TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases

看这行报错以为是typing-extensions的问题，试了几个版本没什么用。而且按照TypeError百度了之后说是类继承冲突，这我也不懂啊！

 File "C:\Users\26735\anaconda3\envs\pytorch\lib\site-packages\setuptools\_importlib.py", line 38, in <module>
    from setuptools.extern import importlib_metadata as metadata

看报错里面有上面那行，想起之前工程运行时setuptools版本过高报过错，所以把setuptools版本从65降成58，就可以运行了。