When it is required to sort list items based on their digits, a method is defined that uses list comprehension and ‘sum’ method to determine the output.
Example
Below is a demonstration of the same −
def sort_list_digit(my_list):
digits = [int(digit) for digit in str(my_list) ]
return sum(digits)
my_list = [124, 20, 106, 35, 44]
print("The list is :")
print(my_list)
print("The result is :")
print(sorted(my_list, key = sort_list_digit))Output
The list is : [124, 20, 106, 35, 44] The result is : [20, 124, 106, 35, 44]
Explanation
A method named ‘sort_list_digit’ is defined that takes a list as a parameter.
It uses list comprehension to iterate over the elements, and convert every element to an integer.
It then returns sum of the digits of the elements in the list as output.
Outside the method, a list of integers is defined and is displayed on the console.
The list is sorted and key is specified as the previously defined method.
This is the output that is displayed on the console.