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

python 3.6, dvc 0.40.1

on almost any command throws issue (warning?):

Failed to import the site module
Traceback (most recent call last):
  File "/Users/philippk/anaconda3/envs/py36/lib/python3.6/site.py", line 541, in <module>
    main()
  File "/Users/philippk/anaconda3/envs/py36/lib/python3.6/site.py", line 522, in main
    known_paths = addusersitepackages(known_paths)
  File "/Users/philippk/anaconda3/envs/py36/lib/python3.6/site.py", line 282, in addusersitepackages
    user_site = getusersitepackages()
  File "/Users/philippk/anaconda3/envs/py36/lib/python3.6/site.py", line 258, in getusersitepackages
    user_base = getuserbase() # this will also set USER_BASE
  File "/Users/philippk/anaconda3/envs/py36/lib/python3.6/site.py", line 248, in getuserbase
    USER_BASE = get_config_var('userbase')
  File "/Users/philippk/anaconda3/envs/py36/lib/python3.6/sysconfig.py", line 608, in get_config_var
    return get_config_vars().get(name)
  File "/Users/philippk/anaconda3/envs/py36/lib/python3.6/sysconfig.py", line 587, in get_config_vars
    import _osx_support
  File "/Users/philippk/anaconda3/envs/py36/lib/python3.6/_osx_support.py", line 4, in <module>
    import re
  File "/Users/philippk/anaconda3/envs/py36/lib/python3.6/re.py", line 142, in <module>
    class RegexFlag(enum.IntFlag):
AttributeError: module 'enum' has no attribute 'IntFlag'

[efiop]

Hi @Casyfill !

Do you have enum34 installed by any chance? You can check that with pip freeze | grep enum34. If you do, please remove it, it is known to cause issues in many packages.

[sunbc0120]

pip uninstall -y enum34