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Python program to find the sum of Characters ascii values in String List

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  • Last Updated : 24 Jul, 2022

Given the string list, the task is to write a Python program to compute the summation value of each character’s ASCII value.

Examples:

Input : test_list = [“geeksforgeeks”, “teaches”, “discipline”] 
Output : [133, 61, 100] 
Explanation : Positional character summed to get required values.

Input : test_list = [“geeksforgeeks”, “discipline”] 
Output : [133, 100] 
Explanation : Positional character summed to get required values. 

Method 1 : Using ord() + loop

In this, we iterate each character in each string and keep on adding positional values to get its sum. The summed value is appended back to the result in a list.

Python3




# Python3 code to demonstrate working of
# Characters Positions Summation in String List
# Using ord() + loop
 
# initializing list
test_list = ["geeksforgeeks",
             "teaches", "us", "discipline"]
 
# printing original list
print("The original list is : " + str(test_list))
 
res = []
for sub in test_list:
    ascii_sum = 0
     
    # getting ascii value sum
    for ele in sub :
        ascii_sum += (ord(ele) - 96)
         
    res.append(ascii_sum)
 
# printing result
print("Position Summation List : " + str(res))

Output:

The original list is : [‘geeksforgeeks’, ‘teaches’, ‘us’, ‘discipline’] Position Summation List : [133, 61, 40, 100]

Method 2 : Using list comprehension + sum() + ord()

In this, we get summation using sum(), ord() is used to get the ASCII positional value, and list comprehension offers one-liner solution to this problem.

Python3




# Python3 code to demonstrate working of
# Characters Positional Summation in String List
# Using list comprehension + sum() + ord()
 
# initializing list
test_list = ["geeksforgeeks", "teaches",
             "us", "discipline"]
 
# printing original list
print("The original list is : " + str(test_list))
 
# sum() gets summation, list comprehension
# used to perform task in one line
res = [sum([ord(ele) - 96 for ele in sub]) for sub in test_list]
 
# printing result
print("Positional Summation List : " + str(res))

 Output:

The original list is : [‘geeksforgeeks’, ‘teaches’, ‘us’, ‘discipline’] Position Summation List : [133, 61, 40, 100]

The time and space complexity for all the methods are the same:

Time Complexity : O(n2)
Auxiliary Space : O(n)


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