What are the differences between virtualenv and venv?

What are the differences between virtualenv and venv?

Both virtualenv and venv are tools for creating isolated Python environments, but they have some differences. Virtualenv is a third-party tool that works with multiple Python versions, while venv is included in the Python standard library starting from Python 3.3.

Can you explain why I might choose one over the other?

You might choose venv for simplicity and if you're using Python 3.3 or later, as it's built-in. Virtualenv is better if you need to manage multiple Python versions or if you're working with older Python versions.

Are there any performance differences between them?

Generally, there are no significant performance differences. However, venv might be slightly faster since it's part of the standard library and doesn't require additional installation.

Can I use both in the same project?

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