Leggi il codice attentamente

from functools import singledispatch


@singledispatch
def describe(value: object) -> str:
    return f"unknown: {value!r}"


@describe.register
def _(value: int) -> str:
    return f"int: {value}"


@describe.register
def _(value: list) -> str:
    return f"list of {len(value)}"


@describe.register
def _(value: dict) -> str:
    return f"dict with keys {sorted(value)}"


print(describe(42))
print(describe([1, 2, 3]))
print(describe({"b": 2, "a": 1}))
print(describe(3.14))
print(describe(True))

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