Python combinations function

How to get all possible combinations in python

all_combinations = [list(zip(each_permutation, list2)) for each_permutation in itertools.permutations(list1, len(list2))]

Source: kite.com

Python permutation

import itertools

a = [1, 2, 3]
n = 3

perm_iterator = itertools.permutations(a, n)

for item in perm_iterator:
    print(item)

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: 120

Python combinations function

def combinations(iterable, r):
    pool = tuple(iterable)
    n = len(pool)
    for indices in permutations(range(n), r):
        if sorted(indices) == list(indices):
            yield tuple(pool[i] for i in indices)

Source: docs.python.org

Similar codes

46 votes129 views3 answers
Code for making an exe file for python
Python
10 votes136 views1 answer
Pandas sample seed
Python
2 votes128 views1 answer
Python get local ipv4
Python
0 vote135 views1 answer
Global variable not accessible withing thread
Python
1 vote141 views3 answers
Sum method in python
Python
43 votes134 views6 answers
Json dump to file
Python
0 vote154 views1 answer
Flask decoding base 64 image
Python Flask
1 vote119 views2 answers
Remove 1st column pandas
Python
0 vote126 views2 answers
Looping over folder to extract zip winrar python
Python
0 vote124 views1 answer
How to know the length of a dataset tensorflow
Python