yield from

city_vs_squares.py

def cities():
    for city in ['Delhi','Mumbai','Pune','Hyderabad']:
        yield city

def squares():
    for val in range(10):
        yield val ** 2

def all_in_one():
    for city in cities():
        yield city

    for number in squares():
        yield number

def generator_splitted():
    yield from cities()
    yield from squares()
list(all_in_one()) == list(generator_splitted()) # True