Python | Extract Score list of String Last Updated : 09 Apr, 2023 Comments Improve Suggest changes Like Article Like Report Sometimes, while programming we can have a problem in which we dedicate to each character of alphabets a particular score and then according to string, extract only those score for further computations. This can have application in gaming domain. Let's discuss certain ways in which this task can be performed. Method #1 : Using list comprehension + ord() The combination of above functions can be used to perform this task. In this, we perform the task of element iteration using list comprehension and ord() perform the task of checking for index of list that has to be returned. Python3 # Python3 code to demonstrate working of # Extract Score list of String # using list comprehension + ord() # initialize list and string test_list = [3, 4, 5, 7, 5, 8, 1, 5, 7, 10, 6, 7, 9, 11, 3, 1, 3, 6, 7, 9, 7, 4, 6, 4, 2, 1] test_str = "geeksforgeeks" # printing original list and string print("The original list : " + str(test_list)) print("The original string : " + str(test_str)) # Extract Score list of String # using list comprehension + ord() res = [test_list[ord(ele) - 97] for ele in test_str] # printing result print("The Score list is : " + str(res)) Output : The original list : [3, 4, 5, 7, 5, 8, 1, 5, 7, 10, 6, 7, 9, 11, 3, 1, 3, 6, 7, 9, 7, 4, 6, 4, 2, 1] The original string : geeksforgeeks The Score list is : [1, 5, 5, 6, 7, 8, 3, 6, 1, 5, 5, 6, 7] Time Complexity: O(n)Auxiliary Space: O(1) Method #2 : Using zip() + ascii_lowercase + dict() + list comprehension The combination of above functions can also be used to perform this task. In this, the task of joining list element score to character is done by zip() and list comprehension is used to output the final result. Python3 # Python3 code to demonstrate working of # Extract Score list of String # using list comprehension + zip() + ascii_lowercase + dict() import string # initialize list and string test_list = [3, 4, 5, 7, 5, 8, 1, 5, 7, 10, 6, 7, 9, 11, 3, 1, 3, 6, 7, 9, 7, 4, 6, 4, 2, 1] test_str = "geeksforgeeks" # printing original list and string print("The original list : " + str(test_list)) print("The original string : " + str(test_str)) # Extract Score list of String # using list comprehension + zip() + ascii_lowercase + dict() temp = dict(zip(string.ascii_lowercase, test_list)) res = [temp[ele] for ele in test_str] # printing result print("The Score list is : " + str(res)) Output : The original list : [3, 4, 5, 7, 5, 8, 1, 5, 7, 10, 6, 7, 9, 11, 3, 1, 3, 6, 7, 9, 7, 4, 6, 4, 2, 1] The original string : geeksforgeeks The Score list is : [1, 5, 5, 6, 7, 8, 3, 6, 1, 5, 5, 6, 7] Time Complexity: O(n*n), where n is the length of the input list. This is because we’re using zip() + ascii_lowercase + dict() + list comprehension which has a time complexity of O(n*n) in the worst case.Auxiliary Space: O(n), as we’re using additional space res other than the input list itself with the same size of input list. Comment More info M manjeet_04 Follow Improve Article Tags : Python Python Programs Python list-programs Explore Python FundamentalsPython Introduction 3 min read Input and Output in Python 4 min read Python Variables 5 min read Python Operators 5 min read Python Keywords 2 min read Python Data Types 7 min read Conditional Statements in Python 3 min read Loops in Python - For, While and Nested Loops 6 min read Python Functions 5 min read Recursion in Python 4 min read Python Lambda Functions 5 min read Python Data StructuresPython String 5 min read Python Lists 4 min read Python Tuples 4 min read Python Dictionary 3 min read Python Sets 6 min read Python Arrays 7 min read List Comprehension in Python 4 min read Advanced PythonPython OOP Concepts 11 min read Python Exception Handling 5 min read File Handling in Python 4 min read Python Database Tutorial 4 min read Python MongoDB Tutorial 2 min read Python MySQL 9 min read Python Packages 12 min read Python Modules 7 min read Python DSA Libraries 15 min read List of Python GUI Library and Packages 3 min read Data Science with PythonNumPy Tutorial - Python Library 3 min read Pandas Tutorial 6 min read Matplotlib Tutorial 5 min read Python Seaborn Tutorial 15+ min read StatsModel Library- Tutorial 4 min read Learning Model Building in Scikit-learn 8 min read TensorFlow Tutorial 2 min read PyTorch Tutorial 7 min read Web Development with PythonFlask Tutorial 8 min read Django Tutorial | Learn Django Framework 7 min read Django ORM - Inserting, Updating & Deleting Data 4 min read Templating With Jinja2 in Flask 6 min read Django Templates 7 min read Python | Build a REST API using Flask 3 min read How to Create a basic API using Django Rest Framework ? 4 min read Python PracticePython Quiz 3 min read Python Coding Practice 1 min read Python Interview Questions and Answers 15+ min read Like