If you have a large list and want to create smaller lists of it, with a maximum amount of elements, then:
commands = [str(i) for i in range(100)]
print(len(commands)) #100
chunks = [commands[x:x+5] for x in range(0, len(commands), 5)]
print(len(chunks)) #20
print(chunks)
This will look like:
[
['0', '1', '2', '3', '4'],
['5', '6', '7', '8', '9'],
['10', '11', '12', '13', '14'],
['15', '16', '17', '18', '19'],
['20', '21', '22', '23', '24'],
['25', '26', '27', '28', '29'],
['30', '31', '32', '33', '34'],
['35', '36', '37', '38', '39'],
['40', '41', '42', '43', '44'],
['45', '46', '47', '48', '49'],
['50', '51', '52', '53', '54'],
['55', '56', '57', '58', '59'],
['60', '61', '62', '63', '64'],
['65', '66', '67', '68', '69'],
['70', '71', '72', '73', '74'],
['75', '76', '77', '78', '79'],
['80', '81', '82', '83', '84'],
['85', '86', '87', '88', '89'],
['90', '91', '92', '93', '94'],
['95', '96', '97', '98', '99']
]