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Part 2: Python Core Language, Internals & Runtime (6 - 25)

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Python & FastAPI•Part 2: Python Core Language, Internals & Runtime (6 - 25)

`*args`, `**kwargs`, positional-only and keyword-only arguments:

In Simple Words:

  • *args: Collects positional arguments into a tuple.
  • **kwargs: Collects keyword arguments into a dictionary.
  • /: Everything to the left is positional-only.
  • *: Everything to the right is keyword-only.
python
def configure(host, port, /, timeout=30, *, secure=True):
    return f"{host}:{port} (timeout={timeout}, secure={secure})"

# Valid:
configure("127.0.0.1", 8080, secure=True)

# Invalid (raises TypeError):
# configure(host="127.0.0.1", port=8080)
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