Learn how to get Python up and running on Windows, macOS, or Linux—and avoid the biggest pitfalls along the way.

Python 3.0, a new version of the language released earlier this week, has incompatibilities with the 2.x line, according to the Python Software Foundation.

That problem is compounded by developers who created dependencies or software libraries with Python 2, which in turn prevent developers downstream from upgrading to Python version 3.