Congratulations on finishing the SymPy tutorial!
If you are a developer interested in using SymPy in your code, please visit the How-to Guides which discuss key developer tasks.
Intermediate SymPy users and developers might want to visit the Explanations section for common pitfalls and advanced topics.
The SymPy API Reference has a detailed description of the SymPy API.
If you are interested in contributing to SymPy, visit the contribution guides and the full Development Workflow guide on the SymPy wiki.