我是 Linux 和 Ubuntu 的新手。
我试图升级 pip 但遇到了这个......
$ sudo pip install --upgrade pip
Cannot fetch index base URL https://pypi.python.org/simple/
Downloading/unpacking pip from https://pypi.python.org/packages/py2.py3/p/pip/pip-7.1.0-py2.py3-none-any.whl#md5=b108384a762825ec20345bb9b5b7209f
Downloading pip-7.1.0-py2.py3-none-any.whl (1.1MB): 1.1MB downloaded
Installing collected packages: pip
Found existing installation: pip 1.5.4
Not uninstalling pip at /usr/lib/python2.7/dist-packages, owned by OS
Successfully installed pip
Cleaning up...
知道为什么吗？