Python2.7中升级安装pip失败的解决方法:(亲测有效)(使用whl文件进行python模块的安装)

错误内容为:nnnException:nTraceback (most recent call last):n File “D:\Python27\lib\site-packages\pip\basecommand.py”, line 211, in mainn status = self.run(options, args)n File “D:\Python27\lib\site-pa…