Python: All possible combinations of the elements of a given list, use itertools module

Last update on April 22 2025 12:54:57 (UTC/GMT +8 hours)

35. All Combinations of List Elements

Write a Python program to get all possible combinations of the elements of a given list using the itertools module.

Sample Solution:

Python Code:

import itertools
def combinations_list(list1):
    temp = []
    for i in range(0,len(list1)+1):
        temp.append(list(itertools.combinations(list1,i)))
    return temp

colors = ['orange', 'red', 'green', 'blue']
print("Original list:")
print(colors)
print("\nAll possible combinations of the said list’s elements:")
print(combinations_list(colors))

Sample Output:

Original list:
['orange', 'red', 'green', 'blue']

All possible combinations of the said list’s elements:
[[()], [('orange',), ('red',), ('green',), ('blue',)], [('orange', 'red'), ('orange', 'green'), ('orange', 'blue'), ('red', 'green'), ('red', 'blue'), ('green', 'blue')], [('orange', 'red', 'green'), ('orange', 'red', 'blue'), ('orange', 'green', 'blue'), ('red', 'green', 'blue')], [('orange', 'red', 'green', 'blue')]]

For more Practice: Solve these Related Problems:

• Write a Python program to generate all possible combinations of the elements of a given list using itertools.combinations and then sort them by length.
• Write a Python program to create an iterator that yields all non-empty combinations of a list and then filter out those that do not meet a specific condition.
• Write a Python program to generate combinations of list elements of varying lengths and then count the total number of combinations using itertools.
• Write a Python program to generate all possible combinations of a list and then map a function to convert each combination into a hyphen-separated string.

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