Answer by Yanan for Symbol not found: __PyCodecInfo_GetIncrementalDecoder

I had the same issue, it is successfully fixed by just replacing the _io.so file.

sudo find / -name _io.so

copy the path of the _io.so file which DOES NOT belong to python-2.7.11. For example, copy the path of _io.so which is under python-2.7.5: /usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_io.so

Replace the /usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_io.so file with the _io.so that you just found.