我已经无法导入requests_oauthlib，虽然我已经成功安装了它：
$ sudo pip install requests requests_oauthlib
Requirement already satisfied (use --upgrade to upgrade): requests in /Library/Python/2.7/site-packages
Requirement already satisfied (use --upgrade to upgrade): requests-oauthlib in /usr/local/lib/python2.7/site-packages
Cleaning up...
~ alex$ python
Python 2.7.5 (default, Mar 9 2014, 22:15:05)
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.0.68)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from requests_oauthlib import OAuth1Session
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named requests_oauthlib
更新
>>> import sys; print sys.path
['', '/Library/Python/2.7/site-packages/pip-1.5.6-py2.7.egg', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC', '/Library/Python/2.7/site-packages']
答案 0 :(得分：14)
我有这个问题，除了确保设置了正确的路径之外，我发现正在运行
$ pip install requests requests_oauthlib
解决了这个问题，因为oauthlib不包含在核心requests库中。
答案 1 :(得分：2)
requests-oauthlib已安装在/usr/local/lib/python2.7/site-packages。
但后者不在您的PYTHONPATH / sys.path
中所以添加它。这是一种方式。
sys.path.append('/usr/local/lib/python2.7/site-packages/')