Python错误集锦：升级pip时报错OSError: [WinError 17],再使用pip时提示ModuleNotFoundError: No module named ‘pip’

原文链接：http://www.juzicode.com/archives/3861

错误提示：

升级pip时发生错误，OSError: [WinError 17] 系统无法将文件移到不同的磁盘驱动器。:

D:\dev\Python\Python36-32\Scripts>pip install --upgrade pip
Cache entry deserialization failed, entry ignored
Collecting pip
  Using cached https://files.pythonhosted.org/packages/fe/ef/60d7ba03b5c442309ef42e7d69959f73aacccd0d86008362a681c4698e83/pip-21.0.1-py3-none-any.whl
Installing collected packages: pip
  Found existing installation: pip 9.0.3
    Uninstalling pip-9.0.3:
Exception:
Traceback (most recent call last):
  File "d:\dev\python\python36-32\lib\shutil.py", line 544, in move
    os.rename(src, real_dst)
OSError: [WinError 17] 系统无法将文件移到不同的磁盘驱动器。: 'd:\\dev\\python\\python36-32\\scripts\\pip.exe' -> 'C:\\Users\\uit\\AppData\\Local\\Temp\\pip-ooupzlpu-uninstall\\dev\\python\\python36-32\\scripts\\pip.exe'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "d:\dev\python\python36-32\lib\site-packages\pip\basecommand.py", line 215, in main
  File "d:\dev\python\python36-32\lib\site-packages\pip\commands\install.py", line 342, in run
  File "d:\dev\python\python36-32\lib\site-packages\pip\req\req_set.py", line 778, in install
  File "d:\dev\python\python36-32\lib\site-packages\pip\req\req_install.py", line 754, in uninstall
  File "d:\dev\python\python36-32\lib\site-packages\pip\req\req_uninstall.py", line 115, in remove
  File "d:\dev\python\python36-32\lib\site-packages\pip\utils\__init__.py", line 267, in renames
  File "d:\dev\python\python36-32\lib\shutil.py", line 559, in move
    os.unlink(src)
PermissionError: [WinError 5] 拒绝访问。: 'd:\\dev\\python\\python36-32\\scripts\\pip.exe'

升级pip后提示ModuleNotFoundError: No module named ‘pip’

D:\dev\Python\Python36-32\Scripts>pip -V
Traceback (most recent call last):
  File "d:\dev\python\python36-32\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "d:\dev\python\python36-32\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "D:\dev\Python\Python36-32\Scripts\pip.exe\__main__.py", line 5, in <module>
ModuleNotFoundError: No module named 'pip'

D:\dev\Python\Python36-32\Scripts>

错误原因：

1、使用pip升级pip本身时发生文件读写错误

解决方法：

1、需要先修复pip：

D:\dev\Python\Python36-32>python -m ensurepip
Requirement already satisfied: setuptools in d:\dev\python\python36-32\lib\site-packages
Collecting pip
Installing collected packages: pip
Successfully installed pip-9.0.3

2、再用python -m pip install –upgrade pip方法升级pip：

D:\dev\Python\Python36-32>python -m pip install --upgrade pip
Collecting pip
  Using cached https://files.pythonhosted.org/packages/fe/ef/60d7ba03b5c442309ef42e7d69959f73aacccd0d86008362a681c4698e83/pip-21.0.1-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
Successfully installed pip-21.0.1

扩展内容：

1. Python进阶教程m1–模块(module)

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