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Santhosh Dhaipule Chandrakanth
Asked: 2021-05-26 22:16:25 +0800 CST

Python virtualenv problem after Ubuntu 20.04 upgrade

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I updated my system to Ubuntu 20.04

I already had Python 3.6.7 running with virtualenv and virtualenvwrapper for my python virtual environment.

After the update

I am able to check get the list of virtual environments those I have already created, but when I tried creating a new virtual environment mkvirtualenv -p python newenv

I get this message

Traceback (most recent call last):
  File "/home/abcd/.local/bin/virtualenv", line 7, in <module>
    from virtualenv import main
ImportError: cannot import name 'main' from 'virtualenv' (/usr/lib/python3/dist-packages/virtualenv/__init__.py)

Then I checked the python version after update it was Python 3.8.5

I checked for main inside virtualenv that the Python 3.8.5

Python 3.8.5 (default, Jan 27 2021, 15:41:15) 
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from virtualenv import main
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name 'main' from 'virtualenv' (/usr/lib/python3/dist-packages/virtualenv/__init__.py)
>>>

I tried installing virtualenv and virtualwrapper for Python 3.8.5

python -m pip install virtualenv virtualenvwrapper

since my default Python version is 3.8.5 after the update

even after installing I get the same message ImportError: cannot import name 'main' from 'virtualenv'

I found this post Problem with creating Python 3.6 virtual environment on Ubuntu 20.04

Installed Python 3.6.7 as suggested the most popular answer

cd opt
sudo wget https://www.python.org/ftp/python/3.6.7/Python-3.6.7.tgz
sudo tar -xvf Python-3.6.7.tgz
cd Python-3.6.7

make clean

sudo ./configure

sudo make
sudo make install

updated my bashrc

export VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python3
export WORKON_HOME=$HOME/.virtualenvs
export VIRTUALENVWRAPPER_VIRTUALENV=/home/abcd/.local/bin/virtualenv

# Virtual Environment Wrapper
source /home/abcd/.local/bin/virtualenvwrapper.sh

For VIRTUALENVWRAPPER_PYTHON

which python3
/usr/local/bin/python3

For VIRTUALENVWRAPPER_VIRTUALENV

sudo find / -name "virtualenv"
/home/abcd/.local/bin/virtualenv

For virtualenvwrapper.sh

sudo find / -name "virtualenvwrapper.sh"
/home/abcd/.local/bin/virtualenvwrapper.sh

source ~/.bashrc

Python3 -V displays Python 3.6.7

Python -V displays Python 3.8.5

Installed virtualenv and virtualenvwrapper for Python 3.6.7, using Python3 -m pip install virtualenv virtualenvwrapper

Now I tried creating a virtualenv using Python 3.6.7

mkvirtualenv -p python3 newenv

I get back the same message

Traceback (most recent call last):
  File "/home/abcd/.local/bin/virtualenv", line 7, in <module>
    from virtualenv import main
ImportError: cannot import name 'main' from 'virtualenv' (/usr/lib/python3/dist-packages/virtualenv/__init__.py)

When I went inside the Python 3.6.7 and Python 3.8.5 check for from virtualenv import main

Python 3.8.5 (default, Jan 27 2021, 15:41:15) 
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from virtualenv import main
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name 'main' from 'virtualenv' (/usr/lib/python3/dist-packages/virtualenv/__init__.py)
>>> 

Python 3.6.7 (default, May 26 2021, 09:24:09) 
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from virtualenv import main
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name 'main'
>>>

Whats is the solution, here?

20.04

0 Answers