The issue in #600 still happens to me even if I am using the develop branch with python version 2.7.13:

Stacktrace:
Error detected while processing /Users/lyuan/.vim/bundle/python-mode/autoload/pymode/lint.vim:
line 1:
Traceback (most recent call last):
Error detected while processing /Users/lyuan/.vim/bundle/python-mode/autoload/pymode/lint.vim:
line 1:
File "", line 1, in
Error detected while processing /Users/lyuan/.vim/bundle/python-mode/autoload/pymode/lint.vim:
line 1:
File "/Users/lyuan/.vim/bundle/python-mode/pymode/lint.py", line 9, in
Error detected while processing /Users/lyuan/.vim/bundle/python-mode/autoload/pymode/lint.vim:
line 1:
from pylama.lint.extensions import LINTERS
Error detected while processing /Users/lyuan/.vim/bundle/python-mode/autoload/pymode/lint.vim:
line 1:
File "/Users/lyuan/.vim/bundle/python-mode/pymode/libs/pylama/lint/extensions.py", line 30, in

Error detected while processing /Users/lyuan/.vim/bundle/python-mode/autoload/pymode/lint.vim:
line 1:
from pkg_resources import iter_entry_points
Error detected while processing /Users/lyuan/.vim/bundle/python-mode/autoload/pymode/lint.vim:
line 1:
File "/Users/lyuan/.vim/bundle/python-mode/pymode/libs/pkg_resources/init.py", line 21, in

Error detected while processing /Users/lyuan/.vim/bundle/python-mode/autoload/pymode/lint.vim:
line 1:
import io
Error detected while processing /Users/lyuan/.vim/bundle/python-mode/autoload/pymode/lint.vim:
line 1:
File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/io.py
", line 51, in
Error detected while processing /Users/lyuan/.vim/bundle/python-mode/autoload/pymode/lint.vim:
line 1:
import _io
Error detected while processing /Users/lyuan/.vim/bundle/python-mode/autoload/pymode/lint.vim:
line 1:
ImportError: dlopen(/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/pyt
hon2.7/lib-dynload/_io.so, 2): Symbol not found: __PyCodecInfo_GetIncrementalDecoder