Python3 升级pip 报错AttributeError: 'NoneType' object has no attribute 'bytes'解决方法（亲测）

在我使用pycharm导包时，总是报pip版本的问题

后来我根据提示用命令：python -m -pip install --upgrade pip  升级pip

结果一直报下面错误：

Exception:
Traceback (most recent call last):
  File "E:\pycharm file\venv\lib\site-packages\pip-9.0.1-py3.5.egg\pi
p\basecommand.py", line 215, in main
    status = self.run(options, args)
  File "E:\pycharm file\venv\lib\site-packages\pip-9.0.1-py3.5.egg\pi
p\commands\install.py", line 342, in run
    prefix=options.prefix_path,
  File "E:\pycharm file\venv\lib\site-packages\pip-9.0.1-py3.5.egg\pi
p\req\req_set.py", line 784, in install
    **kwargs
  File "E:\pycharm file\venv\lib\site-packages\pip-9.0.1-py3.5.egg\pi
p\req\req_install.py", line 851, in install
    self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
  File "E:\pycharm file\venv\lib\site-packages\pip-9.0.1-py3.5.egg\pi
p\req\req_install.py", line 1064, in move_wheel_files
    isolated=self.isolated,
  File "E:\pycharm file\venv\lib\site-packages\pip-9.0.1-py3.5.egg\pi
p\wheel.py", line 462, in move_wheel_files
    generated.extend(maker.make(spec))
  File "E:\pycharm file\venv\lib\site-packages\pip-9.0.1-py3.5.egg\pi
p\_vendor\distlib\scripts.py", line 372, in make
    self._make_script(entry, filenames, options=options)
  File "E:\pycharm file\venv\lib\site-packages\pip-9.0.1-py3.5.egg\pi
p\_vendor\distlib\scripts.py", line 276, in _make_script
    self._write_script(scriptnames, shebang, script, filenames, ext)
  File "E:\pycharm file\venv\lib\site-packages\pip-9.0.1-py3.5.egg\pi
p\_vendor\distlib\scripts.py", line 212, in _write_script
    launcher = self._get_launcher('t')
  File "E:\pycharm file\venv\lib\site-packages\pip-9.0.1-py3.5.egg\pi
p\_vendor\distlib\scripts.py", line 351, in _get_launcher
    result = finder(distlib_package).find(name).bytes
AttributeError: 'NoneType' object has no attribute 'bytes'

后来我将升级命令改为：python -m pip install -U --force-reinstall pip     完成pip升级

注意：更新pip之后，Pycharm安装package出现如下报错：

在查找很多方法后都没有解决，所以更新时，要谨慎，最终，我选择降级pip版本为9.0.3

降级命令：

python -m pip install --upgrade pip==9.0.3

  再次尝试安装包，没有出错