AttributeError：模块“枚举”没有属性“IntFlag”-fastai 安装

Question

当我尝试安装 fastai (pip install fastai) 时出现以下错误：

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

完整的追溯：

 Installing build dependencies ... error
  ERROR: Complete output from command /usr/bin/python3 /usr/local/lib/python3.6/dist-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-b8vreosn/overlay --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- setuptools wheel 'numpy==1.13.3; python_version=='"'"'2.7'"'"' and platform_system!='"'"'AIX'"'"'' 'numpy==1.13.3; python_version=='"'"'3.5'"'"' and platform_system!='"'"'AIX'"'"'' 'numpy==1.13.3; python_version=='"'"'3.6'"'"' and platform_system!='"'"'AIX'"'"'' 'numpy==1.14.5; python_version>='"'"'3.7'"'"' and platform_system!='"'"'AIX'"'"'' 'numpy==1.16.0; python_version=='"'"'2.7'"'"' and platform_system=='"'"'AIX'"'"'' 'numpy==1.16.0; python_version=='"'"'3.5'"'"' and platform_system=='"'"'AIX'"'"'' 'numpy==1.16.0; python_version=='"'"'3.6'"'"' and platform_system=='"'"'AIX'"'"'' 'numpy==1.16.0; python_version>='"'"'3.7'"'"' and platform_system=='"'"'AIX'"'"'':
  ERROR: Traceback (most recent call last):
    File "/usr/lib/python3.6/runpy.py", line 193, in _run_module_as_main
      "__main__", mod_spec)
    File "/usr/lib/python3.6/runpy.py", line 85, in _run_code
      exec(code, run_globals)
    File "/usr/local/lib/python3.6/dist-packages/pip/__main__.py", line 16, in <module>
      from pip._internal import main as _main  # isort:skip # noqa
    File "/usr/local/lib/python3.6/dist-packages/pip/_internal/__init__.py", line 4, in <module>
      import locale
    File "/usr/lib/python3.6/locale.py", line 16, in <module>
      import re
    File "/usr/lib/python3.6/re.py", line 142, in <module>
      class RegexFlag(enum.IntFlag):
  AttributeError: module 'enum' has no attribute 'IntFlag'
  Error in sys.excepthook:
  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 53, in apport_excepthook
      if not enabled():
    File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 24, in enabled
      import re
    File "/usr/lib/python3.6/re.py", line 142, in <module>
      class RegexFlag(enum.IntFlag):
  AttributeError: module 'enum' has no attribute 'IntFlag'

  Original exception was:
  Traceback (most recent call last):
    File "/usr/lib/python3.6/runpy.py", line 193, in _run_module_as_main
      "__main__", mod_spec)
    File "/usr/lib/python3.6/runpy.py", line 85, in _run_code
      exec(code, run_globals)
    File "/usr/local/lib/python3.6/dist-packages/pip/__main__.py", line 16, in <module>
      from pip._internal import main as _main  # isort:skip # noqa
    File "/usr/local/lib/python3.6/dist-packages/pip/_internal/__init__.py", line 4, in <module>
      import locale
    File "/usr/lib/python3.6/locale.py", line 16, in <module>
      import re
    File "/usr/lib/python3.6/re.py", line 142, in <module>
      class RegexFlag(enum.IntFlag):
  AttributeError: module 'enum' has no attribute 'IntFlag'
  ----------------------------------------
ERROR: Command "/usr/bin/python3 /usr/local/lib/python3.6/dist-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-b8vreosn/overlay --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- setuptools wheel 'numpy==1.13.3; python_version=='"'"'2.7'"'"' and platform_system!='"'"'AIX'"'"'' 'numpy==1.13.3; python_version=='"'"'3.5'"'"' and platform_system!='"'"'AIX'"'"'' 'numpy==1.13.3; python_version=='"'"'3.6'"'"' and platform_system!='"'"'AIX'"'"'' 'numpy==1.14.5; python_version>='"'"'3.7'"'"' and platform_system!='"'"'AIX'"'"'' 'numpy==1.16.0; python_version=='"'"'2.7'"'"' and platform_system=='"'"'AIX'"'"'' 'numpy==1.16.0; python_version=='"'"'3.5'"'"' and platform_system=='"'"'AIX'"'"'' 'numpy==1.16.0; python_version=='"'"'3.6'"'"' and platform_system=='"'"'AIX'"'"'' 'numpy==1.16.0; python_version>='"'"'3.7'"'"' and platform_system=='"'"'AIX'"'"''" failed with error code 1 in None

Enum34 导致许多软件包出现问题。我尝试使用以下方法解决此问题：

pip freeze | grep enum34

和

pip uninstall -y enum34

我也试过unset PYTHONPATH，但我仍然得到同样的错误。

pip show enum34 WARNING: Package(s) not found: enum34

Answer 1

问题已解决：

正如我之前写的那样，Enum34 会导致许多软件包出现问题。

如果你有类似的问题，只需使用：

pip uninstall -y enum34

我的问题是我应该使用：

sudo pip uninstall -y enum34