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How do type hints work in Python?

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01

Understand the problem

Explain typing.

typing
02

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Nudge consolestandby

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03

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Type hints (def f(x: int) -> str:) annotate types without enforcing them at runtime — tools like mypy/pyright check them statically. The typing module adds Optional, Union/|, List/list, Callable, generics, and TypedDict/Protocol.

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04

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PYHints don't enforce at runtime; introspecting them
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