November 2025
Intermediate to advanced
542 pages
13h 43m
English
Content preview from Python Object-Oriented Programming - Fifth Edition
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Chapter 7 Python Type Hints
Throughout this book, almost all the examples have included type hints. Python added syntax for “annotations” back in Python 3.0. (See PEP 3107: https://peps.python.org/pep-3107/.) This syntax was applied to the problem of type hints starting with Python 3.6. (See PEP 526: https://peps.python.org/pep-0526/.) Since then, the idea of a formalized type system has evolved and grown.
Currently, the details are in https://typing.readthedocs.io/en/latest/spec/. This document describes the type system in detail.
The type hints are optional, and some developers feel they’re a burden because it’s slightly more code that they have to think about.
The type hints provide important clarification, and many developers feel they’re ...
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