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Python: Generates all possible permutations of n different objects

Python Itertools: Exercise-15 with Solution

Write a Python program to generate all possible permutations of n different objects.

Sample Solution:

Python Code:

import itertools
def permutations_all(l):
    for values in itertools.permutations(l):
        print(values)

permutations_all([1])
print("\n")
permutations_all([1,2])
print("\n")
permutations_all([1,2,3])

Sample Output:

(1,)


(1, 2)
(2, 1)


(1, 2, 3)
(1, 3, 2)
(2, 1, 3)
(2, 3, 1)
(3, 1, 2)
(3, 2, 1)

Python Code Editor:


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Python: Tips of the Day

Inverts a dictionary with non-unique hashable values:

Example:

def tips_collect_dictionary(obj):
  inv_obj = {}
  for key, value in obj.items():
    inv_obj.setdefault(value, list()).append(key)
  return inv_obj
ages = {
  "Owen": 25,
  "Jhon": 25,
  "Pepe": 15,
}
print(tips_collect_dictionary(ages))

Output:

{25: ['Owen', 'Jhon'], 15: ['Pepe']}

 

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