from itertools import *
rows = combinations(range(0, 1140), 17)
all_rows = []
for row in rows:
    all_rows.append(row)

>>> import sys
>>> sys.getsizeof(1)  # integer
12
>>> sys.getsizeof([]) # empty list
36
>>> sys.getsizeof(()) # empty tuple
28
>>> sys.getsizeof((1,))  # tuple with one element
32

all_rows = []
for row in rows:
    all_rows.append(row)

all_rows = list(rows)

>>> import sys
>>> sys.getsizeof([None] * 100)
872