AttributeError:模块'pkg_resources‘没有属性'safe_name’oauthlib安装

Question

我正在尝试安装tweepy (并通过扩展oauthlib)，在尝试安装时我得到了以下错误：

Collecting requests-oauthlib>=0.4.1 (from tweepy)
Using cached requests_oauthlib-0.7.0-py2.py3-none-any.whl
Collecting oauthlib>=0.6.2 (from requests-oauthlib>=0.4.1->tweepy)
  Using cached oauthlib-2.0.0.tar.gz
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/private/var/folders/t7/751h0y1102z99ysr6659yjcr0000gn/T/pip-build-aoklhwtw/oauthlib/setup.py", line 70, in <module>
    'Topic :: Software Development :: Libraries :: Python Modules',
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/distutils/core.py", line 108, in setup
    _setup_distribution = dist = klass(attrs)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/setuptools/dist.py", line 263, in __init__
    self.patch_missing_pkg_info(attrs)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/setuptools/dist.py", line 246, in patch_missing_pkg_info
    key = pkg_resources.safe_name(str(attrs['name'])).lower()
AttributeError: module 'pkg_resources' has no attribute 'safe_name'

有趣的是，/private/var/folders/t7/751h0y1102z99ysr6659yjcr0000gn/T/pip-build-aoklhwtw/oauthlib/文件夹不存在，所以我甚至不能更仔细地删除/查看它。

有什么原因吗？

Answer 1

找到了解决办法。我必须升级setuptools，所以：

$ sudo pip3 install --upgrade setuptools

Answer 2

在虚拟环境中运行pip时，我遇到了同样的错误，但是setuptools在我的例子中已经是最新的了。

是什么帮我修好的

# exit the virtualenv
deactivate

# re-initialize your virtual environment (your command may differ)
virtualenv --python=python3.7 env

# activate the virtualenv again
source env/bin/activate

# re-install your dependencies
pip install -r requirements.txt

根本原因

在我的例子中，根本原因是我意外地删除了virtualenv在ubuntu中创建的pkg-resources pip包。由于pip install pkg-resouces失败(pkg-resources不是真正的pypi包)，重新初始化virtualenv是返回该包的唯一方法。

Answer 3

我不得不用

pipenv --rm

然后我重新安装Django，效果很好。