combination python
# 1. Print all combinations
from itertools import combinations
comb = combinations([1, 1, 3], 2)
print(list(combinations([1, 2, 3], 2)))
# Output: [(1, 2), (1, 3), (2, 3)]
# 2. Counting combinations
from math import comb
print(comb(10,3))
#Output: 120python get all combinations of list
itertools.combinations(iterable, r)how to get all possible combinations in python
all_combinations = [list(zip(each_permutation, list2)) for each_permutation in itertools.permutations(list1, len(list2))]python combinations
import itertools
def subs(l):
res = []
for i in range(1, len(l) + 1):
for combo in itertools.combinations(l, i):
res.append(list(combo))
return resPython Combinations
# A Python program to print all
# permutations using library function
from itertools import permutations
# Get all permutations of [1, 2, 3]
perm = permutations([1, 2, 3])
# Print the obtained permutations
for i in list(perm):
print (i)python combinations
def permutations(iterable, r=None):
# permutations('ABCD', 2) --> AB AC AD BA BC BD CA CB CD DA DB DC
# permutations(range(3)) --> 012 021 102 120 201 210
pool = tuple(iterable)
n = len(pool)
r = n if r is None else r
if r > n:
return
indices = list(range(n))
cycles = range(n, n-r, -1)
yield tuple(pool[i] for i in indices[:r])
while n:
for i in reversed(range(r)):
cycles[i] -= 1
if cycles[i] == 0:
indices[i:] = indices[i+1:] + indices[i:i+1]
cycles[i] = n - i
else:
j = cycles[i]
indices[i], indices[-j] = indices[-j], indices[i]
yield tuple(pool[i] for i in indices[:r])
break
else:
returnCopyright © 2021 Codeinu
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