/usr/lib/python2.7/site-packages/requests/__init__.py:80: RequestsDependencyWarning: urllib3 (1.21.1) or chardet (2.2.1) doesn't match a supported version!
RequestsDependencyWarning)
原因：
python库中urllib3 (1.21.1) or chardet (2.2.1) 的版本不兼容
解决方法：
pip uninstall urllib3
pip uninstall chardet
pip install requests