请大神帮看下源码,Django运行出现错误自检排除环境配置问题

$ python manage.py runnserver



Traceback (most recent call last):
  File "manage.py", line 8, in <module>
    from django.core.management import execute_from_command_line
  File "/usr/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 10, in <module>
    from django.apps import apps
  File "/usr/local/lib/python2.7/site-packages/django/apps/__init__.py", line 1, in <module>
    from .config import AppConfig
  File "/usr/local/lib/python2.7/site-packages/django/apps/config.py", line 5, in <module>
    from django.utils._os import upath
  File "/usr/local/lib/python2.7/site-packages/django/utils/_os.py", line 5, in <module>
    import tempfile
  File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/tempfile.py", line 32, in <module>
    import io as _io
  File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/io.py", line 51, in <module>
    import _io
ImportError: dlopen(/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_io.so, 2): Symbol not found: __PyCodecInfo_GetIncrementalDecoder
  Referenced from: /usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_io.so
  Expected in: flat namespace
 in /usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_io.so

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