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Python: Compute the sum of digits of each number of a given list of positive integers

Python Itertools: Exercise-34 with Solution

Write a Python program to compute the sum of digits of each number of a given list of positive integers.

Sample Solution:

Python Code:

from itertools import chain
def sum_of_digits(nums):
    return sum(int(y) for y in (chain(*[str(x) for x in nums])))

nums = [10,2,56]
print("Original tuple: ") 
print(nums)
print("Sum of digits of each number of the said list of integers:")
print(sum_of_digits(nums))

nums = [10,20,4,5,70]
print("\nOriginal tuple: ") 
print(nums)
print("Sum of digits of each number of the said list of integers:")
print(sum_of_digits(nums))

Sample Output:

Original tuple: 
[10, 2, 56]
Sum of digits of each number of the said list of integers:
14

Original tuple: 
[10, 20, 4, 5, 70]
Sum of digits of each number of the said list of integers:
19

Python Code Editor:


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Previous: Write a Python program to find the pairs of maximum and minimum product from a given list. Use itertools module.

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

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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