Accessing Python Type Annotations Safely
Accessing an object's type hints isn't just `obj.__annotations__`. Use `inspect.get_annotations()` in Python 3.10+ for safe access. This is key for tools like FastAPI that introspect your code.
Accessing an object's type hints programmatically isn't just `obj.__annotations__`. The correct method depends on your Python version. For 3.10+, `inspect.get_annotations()` is standard. This is vital for frameworks like FastAPI or Pydantic that build logic from your type hints. The main footgun: in Python < 3.10, accessing `Child.__annotations__` could unexpectedly return `Parent.__annotations__`, causing silent bugs. Python 3.10 fixed this.
Read the original → docs.python.org
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