Python 3. 7 Documentation. Table of Content. What's new in Python 3. 7? 1. Whetting Your Appetite. 2. Using the Python Interpreter. 3. An Informal duction to Python. 4. More Control Flow Tools. 5. Data Structures. 6. Modules. 7. Input and Output. 8. Errors and Exceptions. 9. Classes. 10. Brief Tour of the Standard Library. 11. Brief Tour of the Standard Library — Part II.