Python: fastcore Self usage

fastcore_self.py

from fastcore.utils import Self, L


if __name__ == "__main__":
    f = Self.sum()
    x = L(1, 2, 3)
    print(f(x))

    f = Self.map(lambda a: a + 1)
    x = L(1, 2, 3)
    print(f(x))

    f = Self.map(float)
    x = L(1, 2, 3)
    print(f(x))

    f = Self.map(lambda a: a ** 2)
    x = L(1, 2, 3)
    print(f(x))

    f = Self.filter(lambda a: a % 2 == 1)
    x = L(1, 2, 3)
    print(f(x))

    f = Self.reduce(lambda a, b: a if a > b else b)
    x = L(1, 2, 3)
    print(f(x))