What is the difference between virtualenv and venv in Python?

What is the difference between virtualenv and venv in Python?

Virtualenv and venv are both tools for creating isolated Python environments. Virtualenv is an older, more flexible tool that works with multiple Python versions, while venv is a built-in module in Python 3.3 and later, designed to create lightweight virtual environments.

Which one should I use for my new project?

If you're using Python 3.3 or later, I recommend using venv since it's built-in and simpler to use. However, if you need to manage multiple Python versions or require more features, virtualenv might be the better choice.

Can I use both in the same project?

It's not advisable to use both in the same project as they can conflict with each other. It's best to stick with one tool for consistency.

Are there any performance differences between them?

Generally, there are no significant performance differences. Both tools create isolated environments, but venv is lighter since it's part of the standard library.