ImportError: No module named eventlet
Question: I have installed eventlet library in python using : `pip install eventlet`.
But when I tried to import eventlet this error occured:

    
    
    $python 
    Python 2.7.10 (default, Oct 23 2015, 18:05:06) 
    [GCC 4.2.1 Compatible Apple LLVM 7.0.0 (clang-700.0.59.5)] on darwin
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import eventlet
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    ImportError: No module named eventlet
    

I tried to install it again but I got this :

    
    
    $pip install eventlet
    Requirement already satisfied (use --upgrade to upgrade): eventlet in /Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/eventlet-0.18.1-py3.5.egg
    Requirement already satisfied (use --upgrade to upgrade): greenlet>=0.3 in /Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/greenlet-0.4.9-py3.5-macosx-10.6-intel.egg (from eventlet)
    

How to rectify this error?

P.S : I am using Python 2.7


Answer: This question is not specific to Eventlet, it's just about managing multiple
versions of Python on OSX.

Your `pip` command installed eventlet into
`/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5`, see
version.

It means you actually have two Python versions installed: 2.7 and 3.5 and
`pip` works with 3.5.

Your options:

  * (recommended) use separate virtualenv [1] for every project, explicitly specify python version when creating virtualenv using `virtualenv --python=python2.7 /path/to/new/venv`
  * run python3 and use eventlet in latest Python
  * run `pip2 install eventlet`
  * symlink pip to pip2 `ln -snf $(which pip2) $(which pip)`

[1] <http://docs.python-guide.org/en/latest/dev/virtualenvs/>

