Python – Sort by Units Digit in a List

When it is required to sort by units digit in a list, a method is defined that takes one parameter and uses ‘str’ and negative indexing to determine the output.

Example

Below is a demonstration of the same −

def unit_sort(element):
   return str(element)[-1]

my_list = [716, 134, 343, 24742]

print("The list is :")
print(my_list)

my_list.sort(key=unit_sort)

print("The result is :")
print(my_list)

Output

The list is :
[716, 134, 343, 24742]
The result is :
[24742, 343, 134, 716]

Explanation

• A method named ‘unit_sort’ is defined that takes an element of list as a parameter, and returns the last element after converting it to string as output.

• A list is defined and displayed on the console.

• The list is sorted using ‘sort’ method and the key is specified as the previously defined method.

• This is the output that is displayed on the console.