ImportError:没有名为eventlet的模块

Question

我使用:在python中安装了eventlet库pip install eventlet.但是当我尝试导入eventlet时发生了这个错误:

$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

我试图再次安装它,但我得到了这个:

$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)

如何纠正这个错误？

PS:我使用的是Python 2.7

Answer 1

这个问题不是特定于Eventlet,而是关于在OSX上管理多个版本的Python.

您的pip命令安装了eventlet /Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5,请参阅版本.

这意味着你实际安装了两个Python版本:2.7和3.5,并pip与3.5一起使用.

你的选择:

• (推荐)为每个项目使用单独的virtualenv [1],在使用时创建virtualenv时显式指定python版本 virtualenv --python=python2.7 /path/to/new/venv
• 运行python3并在最新的Python中使用eventlet
• 跑 pip2 install eventlet
• 符号链接pip到pip2 ln -snf $(which pip2) $(which pip)

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