What is Generators in Python

Generator functions act just like regular functions with just one difference that they use the Python yield keyword instead of return. A generator function is a function that returns an iterator. A generator expression is an expression that returns an iterator. Generator objects are used either by calling the next method on the generator object or using the generator object in a "for in" loop.

def test_sequence():
	num = 0
	while num < 10:
		yield num
		num += 1

for i in test_sequence():
	print(i, end=", ")
	
Output
0, 1, 2, 3, 4, 5, 6, 7, 8, 9

A return statement terminates a function entirely but a yield statement pauses the function saving all its states and later continues from there on successive calls.