[Python] Iterate over batch size for each batch

Its there a more pythonic way, or built in function in python to do the following:

def batch(number, batch_size):
number_left = number
while number_left:
if number_left >= batch_size:
yield batch_size
number_left -= batch_size
else:
yield number_left
number_left = 0


batch(21,10) outputs: [10,10,1]

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