在我的电脑(WIN10)上运行pip命令的时候出现错误提示: C:\Windows\system32>pip install requests Collecting requests Exception: Traceback (most recent call last): File "c:\python27\lib\site-packages\pip\basecommand.py", line 215, in main status = self.run(options, args) File "c:\python27\lib\site-packages\pip\commands\install.py", line 324, in run requirement_set.prepare_files(finder) File "c:\python27\lib\site-packages\pip\req\req_set.py", line 380, in prepare_files ignore_dependencies=self.ignore_dependencies)) File "c:\python27\lib\site-packages\pip\req\req_set.py", line 620, in