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Python: Create the smallest possible number using the elements of a given list of integers

Python List: Exercise - 180 with Solution

Write a Python program to create the smallest possible number using the elements of a given list of positive integers.

Sample Solution:

Python Code:

def create_largest_number(lst):
    if all(val == 0 for val in lst):
        return '0'
    result = ''.join(sorted((str(val) for val in lst), reverse=False,
                      key=lambda i: i*( len(str(min(lst))) * 2 // len(i))))
    return result


nums = [3, 40, 41, 43, 74, 9]
print("Original list:")
print(nums)
print("Smallest possible number using the elements of the said list of positive integers:")
print(create_largest_number(nums))

nums = [10, 40, 20, 30, 50, 60]
print("\nOriginal list:")
print(nums)
print("Smallest possible number using the elements of the said list of positive integers:")
print(create_largest_number(nums))
nums = [8, 4, 2, 9, 5, 6, 1, 0]
print("\nOriginal list:")
print(nums)
print("Smallest possible number using the elements of the said list of positive integers:")
print(create_largest_number(nums))

Sample Output:

Original list:
[3, 40, 41, 43, 74, 9]
Smallest possible number using the elements of the said list of positive integers:
3404143749

Original list:
[10, 40, 20, 30, 50, 60]
Smallest possible number using the elements of the said list of positive integers:
102030405060

Original list:
[8, 4, 2, 9, 5, 6, 1, 0]
Smallest possible number using the elements of the said list of positive integers:
01245689

Pictorial Presentation:

Python List: Create the smallest possible number using the elements of a given list of integers.

Flowchart:

Flowchart: Create the smallest possible number using the elements of a given list of integers.

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Previous: Write a Python program to create the largest possible number using the elements of a given list of positive integers.
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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m