problems with running unittest in PyCharm

[lyman]

PyCharm complains as follows when I try running unittest.
It seems caused by this http://stackoverflow.com/questions/29501029/managed-to-break-my-venv-is-it-possible-to-fix

Traceback (most recent call last):
  File "/home/lyman/.pyenv/versions/2.7.2/lib/python2.7/site.py", line 62, in <module>
    import os
  File "/home/lyman/.pyenv/versions/2.7.2/lib/python2.7/os.py", line 49, in <module>
    import posixpath as path
  File "/home/lyman/.pyenv/versions/2.7.2/lib/python2.7/posixpath.py", line 17, in <module>
    import warnings
  File "/home/lyman/.pyenv/versions/2.7.2/lib/python2.7/warnings.py", line 8, in <module>
    import types
  File "/home/lyman/workspace/ali/odps/pyodps/odps/types.py", line 20, in <module>
    import re
  File "/home/lyman/.pyenv/versions/2.7.2/lib/python2.7/re.py", line 282, in <module>
    import copy_reg
  File "/home/lyman/.pyenv/versions/2.7.2/lib/python2.7/copy_reg.py", line 7, in <module>
    from types import ClassType as _ClassType
ImportError: cannot import name ClassType

Process finished with exit code 1

[qinxuye]

一直不能重现，有问题再reopen