关于IntEnum的一种奇怪的“恐惧”

Question

今天我想在Ubuntu 16.04上安装CTFd，但我遇到了一个奇怪的问题。在阅读了ImportError: cannot import name 'IntEnum'并尝试了我能得到的所有解决方案后，我发现错误仍然没有解决

root@iZbp16wvcnnjq61mspee7aZ:/var/www/CTFd# pip install enum34 //As you can see, I have tried to install enum34 :( 
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
Looking in indexes: http://mirrors.cloud.aliyuncs.com/pypi/simple/
Requirement already satisfied: enum34 in /usr/local/lib/python2.7/dist-packages (1.1.8)
root@iZbp16wvcnnjq61mspee7aZ:/var/www/CTFd# python serve.py
Traceback (most recent call last):
  File "serve.py", line 11, in <module>
    app = create_app()
  File "/var/www/CTFd/CTFd/__init__.py", line 223, in create_app
    from CTFd.api import api
  File "/var/www/CTFd/CTFd/api/__init__.py", line 2, in <module>
    from flask_restplus import Api
  File "/usr/local/lib/python2.7/dist-packages/flask_restplus/__init__.py", line 4, in <module>
    from . import fields, reqparse, apidoc, inputs, cors
  File "/usr/local/lib/python2.7/dist-packages/flask_restplus/fields.py", line 20, in <module>
    from .errors import RestError
  File "/usr/local/lib/python2.7/dist-packages/flask_restplus/errors.py", line 8, in <module>
    from ._http import HTTPStatus
  File "/usr/local/lib/python2.7/dist-packages/flask_restplus/_http.py", line 6, in <module>
    from enum import IntEnum
ImportError: cannot import name IntEnum  // THE PROBLEM!

Answer 1

此问题已在enum34 1.1.9中修复

Answer 2

今天早上我们遇到了一个类似的问题，将enum34固定到了1.1.6-他们昨晚发布了1.1.8，出于某种原因，它似乎是一个相对空的包。但坚持1.1.6对我们有效

Answer 3

这可能是由enum34包的最新版本的问题引起的：https://bitbucket.org/stoneleaf/enum34/issues/27/enum34-118-broken 正如所建议的，解决这个问题的一个方法是将其版本固定到1.1.6，该版本运行良好