generator.py

gistfile1.txt

from typing import Iterable, Iterator, Sequence


def range_gen(n=10):
    """Range implemented as generator"""
    # It is used like an iterator,
    # each time next() is called on this generator,
    # code is resumed from yield clause.
    # This allows for lazy computed iterators.
    i = 0
    while True:
        if i >= n:
            break
        yield i
        i += 1


def main():
    gen = range_gen()
    print(type(gen))
    print(f"generator is an iterator? {isinstance(gen, Iterator)}")
    print(f"generator is an iterable? {isinstance(gen, Iterable)}")
    print(f"generator is a sequence? {isinstance(gen, Sequence)}")

    print(f"Consuming the generator in a for-loop")
    for i in range_gen():
        print(i)


if "__main__" == __name__:
    main()