comb = calculate_combinations(n, r)I need the number of possible combinations, not the actual combinations, so itertools.combinations does not interest me.
Finally, I want to avoid using factorials, as the numbers I'll be calculating the combinations for can get too big and the factorials are going to be monstrous.
This seems like a REALLY easy to answer question, however I am being drowned in questions about generating all the actual combinations, which is not what I want.
# A Python program to print all
# combinations of given length
from itertools import combinations
# Get all combinations of [1, 2, 3]
# and length 2
comb = combinations([1, 2, 3], 2)
# Print the obtained combinations
for i in list(comb):
print (i)
