PyCharm is a Python-focused integrated development environment. It includes a number of "smart assistance" features to streamline the programming process, including: code completion, error checking as code is entered, style checking, and "project navigation" to work with large codebases. PyCharm also includes an interactive debugger that allows users to single-step their code, set breakpoints, examine the contents of variables, and more. In addition, PyCharm has integrated support for unit testing that can produce line-by-line code coverage summaries for the tests that were run. A "professional" version of PyCharm that includes support for additional languages, web frameworks, and data science frameworks is also available for purchase. The free version of PyCharm can be located in the Download section of the website. PyCharm is available for Windows, macOS, and Linux systems.