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What is Generators in Python

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=", ")
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.