沒有名爲 pkg_resources 的模塊 - No module named pkg_resources

問題：

I'm deploying a Django app to a dev server and am hitting this error when I run pip install -r requirements.txt :我正在將 Django 應用程序部署到開發服務器，並在運行pip install -r requirements.txt時遇到此錯誤：

Traceback (most recent call last):
  File "/var/www/mydir/virtualenvs/dev/bin/pip", line 5, in <module>
    from pkg_resources import load_entry_point
ImportError: No module named pkg_resources

pkg_resources appears to be distributed with setuptools . pkg_resources似乎與setuptools一起setuptools 。 Initially I thought this might not be installed to the Python in the virtualenv, so I installed setuptools 2.6 (same version as Python) to the Python site-packages in the virtualenv with the following command:最初我認爲這可能沒有安裝到 virtualenv 中的 Python，所以我使用以下命令將setuptools 2.6 （與 Python 相同的版本）安裝到 virtualenv 中的 Python 站點包：

sh setuptools-0.6c11-py2.6.egg --install-dir /var/www/mydir/virtualenvs/dev/lib/python2.6/site-packages

EDIT: This only happens inside the virtualenv.編輯：這隻發生在 virtualenv 內部。 If I open a console outside the virtualenv then pkg_resources is present, but I am still getting the same error.如果我在 virtualenv 之外打開控制檯，則存在pkg_resources ，但我仍然遇到相同的錯誤。

Any ideas as to why pkg_resources is not on the path?關於爲什麼pkg_resources不在路徑上的任何想法？

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解決方案：

參考一： https://stackoom.com/question/VF5n
參考二： No module named pkg_resources