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Puzzle 29: Explanation

Explore how Python's type hints provide optional annotations for variables and functions to enhance code clarity and correctness. Understand their role in tools like Mypy, IDE support, and how they improve documentation and coding efficiency with practical examples.

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Try it yourself

Try executing the code below to verify the result:

Python 3.8
def add(a: int, b: int) -> int: 
  return a + b
val = add('1', '2') 
print(val)

Explanation

Python 3 added support for type hints. As the name suggests, though, they’re only hints that are not enforced by the Python interpreter. The only thing Python does with these hints (sometimes called annotations) is to add them to ...