Question

出什么问题了？我尝试了“ python -m pip install -U pip ”和“ python -m pip install --upgrade pip ”，但都出现了相同的错误（和“ pip安装-U --force-reinstall pip ”）。我该怎么办？

C:\Users\Peyman\PycharmProjects\untitled3>python -m pip install -U pip
Collecting pip
  Using cached https://files.pythonhosted.org/packages/5f/25/e52d3f31441505a5f3af41213346e5b6c221c9e086a166f3703d2ddaf940/pip-18.0-py2.py3-none-any.whl
Installing collected packages: pip
  Found existing installation: pip 9.0.3
    Uninstalling pip-9.0.3:
      Successfully uninstalled pip-9.0.3
  Rolling back uninstall of pip
Exception:
Traceback (most recent call last):
  File "C:\Users\Peyman\AppData\Roaming\Python\Python35\site-packages\pip\basecommand.py", line 215, in main
    status = self.run(options, args)
  File "C:\Users\Peyman\AppData\Roaming\Python\Python35\site-packages\pip\commands\install.py", line 342, in run
    prefix=options.prefix_path,
  File "C:\Users\Peyman\AppData\Roaming\Python\Python35\site-packages\pip\req\req_set.py", line 784, in install
    **kwargs
  File "C:\Users\Peyman\AppData\Roaming\Python\Python35\site-packages\pip\req\req_install.py", line 851, in install
    self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
  File "C:\Users\Peyman\AppData\Roaming\Python\Python35\site-packages\pip\req\req_install.py", line 1064, in move_wheel_files
    isolated=self.isolated,
  File "C:\Users\Peyman\AppData\Roaming\Python\Python35\site-packages\pip\wheel.py", line 462, in move_wheel_files
    generated.extend(maker.make(spec))
  File "C:\Users\Peyman\AppData\Roaming\Python\Python35\site-packages\pip\_vendor\distlib\scripts.py", line 372, in make
    self._make_script(entry, filenames, options=options)
  File "C:\Users\Peyman\AppData\Roaming\Python\Python35\site-packages\pip\_vendor\distlib\scripts.py", line 276, in _make_script
    self._write_script(scriptnames, shebang, script, filenames, ext)
  File "C:\Users\Peyman\AppData\Roaming\Python\Python35\site-packages\pip\_vendor\distlib\scripts.py", line 212, in _write_script
    launcher = self._get_launcher('t')
  File "C:\Users\Peyman\AppData\Roaming\Python\Python35\site-packages\pip\_vendor\distlib\scripts.py", line 351, in _get_launcher
    result = finder(distlib_package).find(name).bytes
AttributeError: 'NoneType' object has no attribute 'bytes'
You are using pip version 9.0.3, however version 18.0 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

Answer 1

根据此bug report，尝试使用easy_install -U pip。

编辑：好的，转到“ https://pypi.org/simple/pip/”，然后下载最新的.whl文件（滚动到底部）。拥有它后，在同一文件夹中打开cmd（通过在文件资源管理器中单击File-> open powershell / cmd），然后键入

pip install filename，文件名是您下载的文件的名称（应为pip-18.0-py2.py3-none-any.whl）。

尝试一下，告诉我是否可行。

Answer 2

您可以尝试以下操作：

python -m pip install -U --force-reinstall pip

Answer 3

我的答案是assmmahmud的变体，但对我来说，我必须使用--user选项。我在Windows上，所以来自CMD.exe；

py -m pip install --user --force-reinstall -U

如果我不使用--user选项，则会发生错误。

Python 3.5 pip 9 AttributeError：“ NoneType”对象没有属性“ bytes”

3 个答案: