nchoosek function in python

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def nchoosek(startnum, endnum, step=1, n=1):
c = []
for i in itertools.combinations(range(startnum,endnum+1,step),n):
c.append(list(i))
return c
a = nchoosek(1, 3, step=1, n=2)print(a)

This will output:

[[1, 2], [1, 3], [2, 3]]

Done!

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