Itertools-Cartesian-Product-var-args, Python 3

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#python 3.5.2
import itertools

def get_combined_number(*group):
      return int("".join(str(num) for num in group))

def get_numbers(*numbers_list):
    numbers = []
    for group in itertools.product(*numbers_list):
        numbers.append(get_combined_number(*group))

return numbers
          
# Test case 1st
A=[1,2,3,4,5]
B=[6,7]
C=[8,9,10]

numbers = get_numbers(A, B, C)  # Any number of arrays/list can be passed
print(numbers) # [168, 169, 1610, 178, 179, 1710, 268, 269, 2610, 278, 279, 2710, 368, 369, 3610, 378, 379, 3710, 468, 469, 4610, 478, 479, 4710, 568, 569, 5610, 578, 579, 5710]

# Test case 2
D = [1, 4, 9]
E = [2, 7, 1729]
F = [8, 9,11]
G = [ 45, 92, 4, 12, 67]
numbers = get_numbers(D, E, F, G)
print(numbers) # [12845, 12892, 1284, 12812, 12867, 12945, 12992, 1294, 12912, 12967, 121145, 121192, 12114, 121112, 121167, 17845, 17892, 1784, 17812, 17867, 17945, 17992, 1794, 17912, 17967, 171145, 171192, 17114, 171112, 171167, 11729845, 11729892, 1172984, 11729812, 11729867, 11729945, 11729992, 1172994, 11729912, 11729967, 117291145, 117291192, 11729114, 117291112, 117291167, 42845, 42892, 4284, 42812, 42867, 42945, 42992, 4294, 42912, 42967, 421145, 421192, 42114, 421112, 421167, 47845, 47892, 4784, 47812, 47867, 47945, 47992, 4794, 47912, 47967, 471145, 471192, 47114, 471112, 471167, 41729845, 41729892, 4172984, 41729812, 41729867, 41729945, 41729992, 4172994, 41729912, 41729967, 417291145, 417291192, 41729114, 417291112, 417291167, 92845, 92892, 9284, 92812, 92867, 92945, 92992, 9294, 92912, 92967, 921145, 921192, 92114, 921112, 921167, 97845, 97892, 9784, 97812, 97867, 97945, 97992, 9794, 97912, 97967, 971145, 971192, 97114, 971112, 971167, 91729845, 91729892, 9172984, 91729812, 91729867, 91729945, 91729992, 9172994, 91729912, 91729967, 917291145, 917291192, 91729114, 917291112, 917291167]

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Absolute running time: 0.14 sec, cpu time: 0.12 sec, memory peak: 6 Mb, absolute service time: 0,15 sec