AttributeError: module 'enum' has no attribute 'IntFlag'

Mac PyCharm新建以Python3.6.1为解释器的Django项目的时候出现以下错误提示：

  AttributeError: module 'enum' has no attribute 'IntFlag'

$ /Library/Frameworks/Python.framework/Versions/3.6/bin/python3

Failed to import the site module

Traceback (most recent call last):

  File "/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site.py", line 544, in <module>

    main()

  File "/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site.py", line 530, in main

    known_paths = addusersitepackages(known_paths)

  File "/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site.py", line 282, in addusersitepackages

    user_site = getusersitepackages()

  File "/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site.py", line 258, in getusersitepackages

    user_base = getuserbase() # this will also set USER_BASE

  File "/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site.py", line 248, in getuserbase

    USER_BASE = get_config_var('userbase')

  File "/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/sysconfig.py", line 601, in get_config_var

    return get_config_vars().get(name)

  File "/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/sysconfig.py", line 580, in get_config_vars

    import _osx_support

  File "/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/_osx_support.py", line 4, in <module>

    import re

  File "/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/re.py", line 142, in <module>

    class RegexFlag(enum.IntFlag):

AttributeError: module 'enum' has no attribute 'IntFlag'

解决方法，.bash_profile中设置PYTHONPATH的代码全部注解，然后source .bash_profile，然后再新建项目，便再没出现错误。命令如下：

source .bash_profile
unset PYTHONPATH

错误分析，PYTHONPATH设置是为了Python2.7设置的，其中安装的包覆盖了Python3正确的包，于是出现以上错误。

参考：https://stackoverflow.com/questions/43124775/why-python-3-6-1-throws-attributeerror-module-enum-has-no-attribute-intflag

巴特西

AttributeError: module 'enum' has no attribute 'IntFlag'

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