reverse_number.py

import math

def reverse_int_without_string(number):
	"""
	reverse without change number into string
	"""
	number_copy = abs(number)
	digits_number = [] # split number by their digits
	while number_copy > 0 :
		digits_number.append(number_copy%10)
		number_copy = number_copy // 10
	# multiple number with her index with 10 = > 123 => 1*100 + 2* 10 + 3 * 1
	number_copy = [] 
	for i in digits_number :
		digits_number = digits_number[1:]
		for j in range(len(digits_number)):
			print(j)
			i *= 10
		number_copy.append(i)
	number_copy = sum(number_copy)
	return int(math.copysign(number_copy,number)*-1)