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

0 vote138 views1 answer
Rails in groups of
Python
27 votes138 views6 answers
Get all file in folder Python
Python
0 vote128 views1 answer
Square all elements in list python
Python
0 vote87 views2 answers
Nested renamer is not supported pandas
Python
-1 vote129 views2 answers
How to set pandas dataframe as global
Python
0 vote157 views2 answers
Logarithmic 2d histogram
Python
0 vote144 views1 answer
Stemming words python
Python
12 votes109 views1 answer
Convert integer column to string in pandas
Python
8 votes156 views2 answers
Determinant of matrix in python
Python
0 vote132 views1 answer
How to replace an element of a list using list comprehension
Python