安裝了virtualenv，但仍然出現“ ModuleNotFoundError：沒有名為“ virtualenv”的模塊”錯誤

Question

我正在使用CentOS 7，並希望運行“ virtualenv”命令。 所以我嘗試卸載並重新安裝它...

[myuser@server ~]$ sudo pip uninstall virtualenv
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.
Cannot uninstall 'virtualenv'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.
[myuser@server ~]$ sudo pip install virtualenv
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.
Requirement already satisfied: virtualenv in /usr/lib/python2.7/site-packages (15.1.0)

但是當我去實際運行它時，被告知它沒有安裝。

[myuser@server ~]$ virtualenv myenv
Traceback (most recent call last):
  File "/usr/bin/virtualenv", line 2, in <module>
    import virtualenv
ModuleNotFoundError: No module named 'virtualenv'

WTF？

Answer 1

您可以只刪除virtualenv rm -r ./your_venv ，然后創建一個新的python3 -m virtualenv your_venv並激活此source ./your_venv/bin/activate 。 現在您處於分離的環境中。 例如，在這種狀態下，您可以安裝libs pip install -r ./requirements.txt 。 這些庫將僅安裝在您的環境內部，而不是全局安裝。

Answer 2

嘗試python -m virtualenv myenv 。 -m標志表示模塊。 使用此命令，您明確地告訴python將腳本virtualenv作為腳本運行。