打算把7.1.2 的pip升级到9.0.1 ,结果直接采用cmd推荐的python -m pip install --upgrade pip 总是报出下面的错误:
Installing collected packages: pip
Found existing installation: pip 7.1.2
Uninstalling pip-7.1.2:
Successfully uninstalled pip-7.1.2
Rolling back uninstall of pip
Exception:
Traceback (most recent call last):
File "C:\Users\luofuli\AppData\Roaming\Python\Python27\site-packages\pip\basec
ommand.py", line 211, in main
status = self.run(options, args)
File "C:\Users\luofuli\AppData\Roaming\Python\Python27\site-packages\pip\comma
nds\install.py", line 311, in run
root=options.root_path,
File "C:\Users\luofuli\AppData\Roaming\Python\Python27\site-packages\pip\req\r
eq_set.py", line 646, in install