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Python | Extract Score list of String
  • Last Updated : 29 Nov, 2019

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 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]

 



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 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]

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