Python Generator Send & Recieve

#############################################
# Yield returns a generator object
# use next() to access the return value
# If you attempt to invoke next() on a generator object that had already produced (yielded) all its values, it will throw StopIteration exception
# We can pass data to a generator function using the send() method defined
# Use generators to generate values and coroutines to consume values. Generator functions receive values are called coroutines. 

#############################################


############# Test1 (send & receive) ############ 
def test_yield_send():
    while True:
        item = yield
        print(f'Received item: {item}')

if __name__ == '__main__':
    gen = test_yield_send()
    print(gen)  #<generator object test_yield at 0x7ff2f0510c80>
    next(gen)
    gen.send(100)

Output:

<generator object test_yield_send at 0x7ff700b45c80>

Received item: 100

############ Test2 (send & receive) ############ 
def generate_num():
    i = 0
    while True:
        i += 1
        t = (yield i)
        print(t)


if __name__ == "__main__":
    gen = generate_num()

    item = gen.send(None)
    print("First received " + str(item))

    for i in range(0, 5):
        item = gen.send(100 + i)
        print("Other received " + str(item))


Output:
First received 1
100
Other received 2
101
Other received 3
102
Other received 4
103
Other received 5
104
Other received 6