def gensquares(N):
    for number in range(N):
        if number < N:
            print(f'yielding number: {number}')
            yield number**2


for x in gensquares(10):
    print('yielded squared number: ', x)

>> yielding number: 0
>> yielded squared number:  0
>> yielding number: 1
>> yielded squared number:  1
>> yielding number: 2
>> yielded squared number:  4
>> yielding number: 3
>> yielded squared number:  9
>> yielding number: 4
>> yielded squared number:  16
>> yielding number: 5
>> yielded squared number:  25
>> yielding number: 6
>> yielded squared number:  36
>> yielding number: 7
>> yielded squared number:  49
>> yielding number: 8
>> yielded squared number:  64
>> yielding number: 9
>> yielded squared number:  81