【python】win10中python3.5.2输入pip出现Fatal error in launcher: Unable to create process using '"'

系统：windows 10

python版本：3.5.2

出现的错误如下：　　

　　C:\Users\zhuxy>pip list

　　Fatal error in launcher: Unable to create process using '"'

尝试的解决办法：　　

C:\Users\zhuxy>python -m pip install package

Collecting package

Downloading package-0.1.1.tar.gz

Complete output from command python setup.py egg_info:

Traceback (most recent call last):

File "<string>", line 1, in <module>

File "C:\Users\zhuxy\AppData\Local\Temp\pip-build-5iqrtl2k\package\setup.py", line 31

"""

SyntaxError: invalid syntax

----------------------------------------

Command "python setup.py egg_info" failed with error code 1 in C:\Users\zhuxy\AppData\Local\Temp\pip-build-5iqrtl2k\package\

You are using pip version 8.1.1, however version 9.0.1 is available.

You should consider upgrading via the 'python -m pip install --upgrade pip' command.

提示已经很明显了

C:\Users\zhuxy>

C:\Users\zhuxy>python -m pip install --upgrade pip

Collecting pip

Downloading pip-9.0.1-py2.py3-none-any.whl (1.3MB)

100% |████████████████████████████████| 1.3MB 7.7kB/s

Installing collected packages: pip

Found existing installation: pip 8.1.1

Uninstalling pip-8.1.1:

Successfully uninstalled pip-8.1.1

Successfully installed pip-9.0.1

再次输入pip成功：

C:\Users\zhuxy>pip

Usage:

pip <command> [options]

Commands:

install Install packages.

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