Tox is a popular testing tool for Python projects that automates the testing of code across multiple environments. It helps developers ensure that their code works as expected in different Python versions and configurations, making it essential for maintaining compatibility and quality.

Features of Tox:

• Easily configure and run tests across different Python versions and environments.
• Automatically installs dependencies for each testing environment, ensuring consistency.
• Works seamlessly with continuous integration and continuous deployment systems.
• Supports flexible configuration through a simple tox.ini file.

Check version: tox --version.

Disclaimer: Tox is an open-source project provided "as is" without any warranty. Users are encouraged to contribute to its development and report any issues they encounter.