Python – Sort List items on basis of their Digits

When it is required to sort the elements of a list based on the digits, the ‘max’, ‘max’ method are used. We will also use the ‘sorted’ method, the ‘lambda’ function and ‘ljust’.

Example

Below is a demonstration of the same −

my_list = [4344, 2611, 122, 541, 33, 892, 48292, 460, 390, 120, 10, 2909, 11239, 1]

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

print("The list after sorting is : " )
my_list.sort()
print(my_list)

my_temp_val = map(str, my_list)

my_max_length = max(map(len, my_temp_val))

my_result = sorted(my_list, key = lambda index : (str(index).ljust(my_max_length, 'a')))

print("The resultant list is : ")
print(my_result)

Output

The list is :
[4344, 2611, 122, 541, 33, 892, 48292, 460, 390, 120, 10, 2909, 11239, 1]
The list after sorting is :
[1, 10, 33, 120, 122, 390, 460, 541, 892, 2611, 2909, 4344, 11239, 48292]
The resultant list is :
[10, 11239, 120, 122, 1, 2611, 2909, 33, 390, 4344, 460, 48292, 541, 892]

Explanation

• A list of strings is defined and is displayed on the console.

• The list is sorted using a sort method and is displayed on the console.

• The ‘map’ method is used to convert all elements in the list to a string.

• This is assigned to a variable

• The maximum of the elements in the list is found and assigned to a variable.

• The sorted method is used to sort the list, and the key is the lambda function with the left justification.

• This is assigned to a result.

• This is displayed as output on the console.