ImportError: cannot import name 'Feature' from 'setuptools' (D:python_learnmeiduo_projectenvlibsite-packagessetuptools\__init__.py)问题

查询后发现是,因MarkupSafe==1.0 版本较低， 其引用Feature的方式from setuptools import Feature在新版本的setuptools包中已被弃用，
所以导致了上文出现的bug。
那解决思路就清晰了，如下思路取一即可。

1. 升级 MarkupSafe==1.1.1
2. 降级 setuptools==45.2.0

报错:

Collecting MarkupSafe==1.0
  Downloading https://pypi.tuna.tsinghua.edu.cn/packages/4d/de/32d741db316d8fdb7680822dd37001ef7a448255de9699ab4bfcbdf4172b/MarkupSafe-1.0.tar.gz (14 kB)
    ERROR: Command errored out with exit status 1:
     command: 'D:python_learnmeiduo_projectenvScriptspython.exe' -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\Users\sewen\AppData\Local\Temp\pip-install-8mqd0f
cd\MarkupSafe\setup.py'"'"'; __file__='"'"'C:\Users\sewen\AppData\Local\Temp\pip-install-8mqd0fcd\MarkupSafe\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);
code=f.read().replace('"'"'
'"'"', '"'"'
'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base 'C:UserssewenAppDataLocalTemppip-pip-egg-info-h2xw
dl2l'
         cwd: C:UserssewenAppDataLocalTemppip-install-8mqd0fcdMarkupSafe
    Complete output (5 lines):
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "C:UserssewenAppDataLocalTemppip-install-8mqd0fcdMarkupSafesetup.py", line 6, in <module>
        from setuptools import setup, Extension, Feature
    ImportError: cannot import name 'Feature' from 'setuptools' (D:python_learnmeiduo_projectenvlibsite-packagessetuptools__init__.py)
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

执行:

pip install --upgrade pip setuptools==45.2.0

如下:

正常安装 问题解决.