How to create a Python 3 virtualenv successfully?

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#1

How do I create a python3 virtualenv for my project?

I need to use Python 3.4, but when I run virtualenv -p python3 test, I encounter the following error:

Running virtualenv with interpreter /usr/local/bin/python3 Using base prefix ‘/usr/local/Cellar/python3/3.4.0_1/Frameworks/Python.framework/Versions/3.4’ New python executable in test/bin/python3.4 Also creating executable in test/bin/python Failed to import the site module Traceback (most recent call last): File “/Users/user/Documents/workspace/test/test/bin/…/lib/python3.4/site.py”, line 67, in import os File “/Users/user/Documents/workspace/test/test/bin/…/lib/python3.4/os.py”, line 634, in from _collections_abc import MutableMapping ImportError: No module named ‘_collections_abc’ ERROR: The executable test/bin/python3.4 is not functioning ERROR: It thinks sys.prefix is ‘/Users/user/Documents/workspace/test’ (should be ‘/Users/user/Documents/workspace/test/test’) ERROR: virtualenv is not compatible with this system or executable

How can I successfully create a python3 virtualenv?

#2

Wishing you all the best with your Python setup!

To manage different Python versions and avoid conflicts when creating a Python 3 virtual environment, you can use pyenv. Here’s a simple step-by-step guide:

  1. Install pyenv: First, install pyenv on your system.
  2. Install Python 3.4: Once pyenv is installed, you can install Python 3.4 with the following command:
    pyenv install 3.4.0
  3. Set Python version locally: To use Python 3.4 for your project, set it locally using:
    pyenv local 3.4.0
  4. Create a virtual environment: Now, create the Python 3 virtual environment with this command:
    pyenv exec virtualenv venv

This will set up a Python 3.4 virtual environment without any version conflicts.

Thank you, and happy coding!

#3

Hey @sakshikuchroo If you’re running into compatibility issues with Python 3.4, it might be because you’re using an outdated version of virtualenv. To fix this, you can upgrade virtualenv to the latest version by running:

pip install --upgrade virtualenv

Once that’s done, try creating your Python 3 virtual environment again with:

virtualenv -p python3 test

This should help resolve any issues.

Thank you!

#4

Use python3 -m venv instead of virtualenv: Starting from Python 3.3, the built-in venv module can be used to create a virtual environment. Instead of using virtualenv, you can use:

python3 -m venv test This will create a python3 virtualenv using the system’s Python 3 installation.