The best open source alternative to PyCharm is Atom, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to PyCharm and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to PyCharm are Eclipse (Free, Open Source), VSCodium (Free, Open Source), Geany (Free, Open Source) and Apache NetBeans (Free, Open Source).
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Atom vs PyCharm opinions
Some users think Atom is a great alternative to PyCharm, some don't.
Atom is a text editor, not an ide
Negative comment • about 3 years ago
alexprange Pycharm is full feature IDE... Atom is a text editor with some advanced features as is visual studio code and sublime. Next best after Pycharm Is Anaconda
Bluefish is a powerful editor targeted towards programmers and webdesigners, with many options to write websites, scripts and programming code. Bluefish supports many programming and markup languages, and it focuses on editing dynamic and interactive websites.
Completely free enterprise-ready Python distribution for large-scale data processing, predictive analytics, and scientific computing. Includes 100+ of the most popular Python packages for science, math, engineering, data analysis. Cross platform on Linux, Windows, Mac.