python 2.7.12报ImportError: No module named _socket
最近在做一个smpp的python库，由于RF依赖Python2，于是从python3切换到python2，运行代码提示：
File "C:Python27libsocket.py", line 47, in <module>
import _socketImportError: No module named _socket
百度了一下，在https://stackoverflow.com/questions/24173487/import-socket-import-error-dll-load-failed 这个页面看到了解决方法：重新安装python 2.7.12，有人说是32位和64位操作系统的问题，下面是这些人的解释：
Attempting to install python 2.7.12 again, the installer recognized the existing installation and offered me change/repair/uninstall options.
Update: In retrospective, the reason might have been, that I unintentionally mixed a 32-bit installation with a 64-bit update (or vice versa). Python doesn"t seem to install into different directories or use different DLL-names. The installer doesn"t warn you
either. So after the update, your DLLs are a unhealthy mix of 32 and 64-bit variants.
I would suggest getting, PyWin32 or either PyWin64, depending on your System architecture. If your system is x86, get PyWin32, otherwise get PyWin64 if your system is x64. I have similar problems myself and getting PyWin32 helped me out in fixing these problems.
我的电脑是64位的，于是去https://www.python.org/downloads/release/python-2712/下载了64位的安装包，重新安装了python 2.7.12，问题解决。
