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Python: Create all possible permutations from a given collection of distinct numbers

Python Basic - 1: Exercise-12 with Solution

Write a Python program to create all possible permutations from a given collection of distinct numbers.

Pictorial Presentation:

Python: Create all possible permutations from a given collection of distinct numbers

Sample Solution:

Python Code:

def permute(nums):
  result_perms = [[]]
  for n in nums:
    new_perms = []
    for perm in result_perms:
      for i in range(len(perm)+1):
        new_perms.append(perm[:i] + [n] + perm[i:])
        result_perms = new_perms
  return result_perms

my_nums = [1,2,3]
print("Original Cofllection: ",my_nums)
print("Collection of distinct numbers:\n",permute(my_nums))

Sample Output:

Original Cofllection:  [1, 2, 3]
Collection of distinct numbers:
 [[3, 2, 1], [2, 3, 1], [2, 1, 3], [3, 1, 2], [1, 3, 2], [1, 2, 3]]

Flowchart:

Flowchart: Python - Create all possible permutations from a given collection of distinct numbers

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Previous: Write a Python program to check the sum of three elements (each from an array) from three arrays is equal to a target value. Print all those three-element combinations.
Next: Write a Python program to get all possible two digit letter combinations from a digit (1 to 9) string.

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Python: Tips of the Day

Python: The Zip() Function

>>> students = ('John', 'Mary', 'Mike')
>>> ages = (15, 17, 16)
>>> scores = (90, 88, 82, 17, 14)
>>> for student, age, score in zip(students, ages, scores):
...     print(f'{student}, age: {age}, score: {score}')
... 
John, age: 15, score: 90
Mary, age: 17, score: 88
Mike, age: 16, score: 82
>>> zipped = zip(students, ages, scores)
>>> a, b, c = zip(*zipped)
>>> print(b)
(15, 17, 16)