No module named extern!

1.check if setuptools successfully installed or not

2.copy pkg-resources(include extern dir) to the ......../lib/python2.7/site-packages/

ImportError: libzmq.so.5: cannot open shared object file: No such file or directory

1.find libzmq.so.5 absolute path

2.add it to the /etc/ld.so.conf 

   vim ld.so.conf

  加入 libzmq.so.5    eg. /data/zeromq/lib

3.ldconfig

Centos7.2 errors

原文：http://www.cnblogs.com/Viewsky/p/5809258.html