Python – Extract range characters from String
Given a String, extract characters only which lie between given letters.
Input : test_str = ‘geekforgeeks is best’, strt, end = “g”, “s”
Output : gkorgksiss
Explanation : All characters after g and before s are retained.
Input : test_str = ‘geekforgeeks is best’, strt, end = “g”, “r”
Output : gkorgki
Explanation : All characters after g and before r are retained.
Method #1 : Using list comprehension
In this, we check for character in range using comparison operation and list comprehension does task of iteration and creation of new list. Then join() can be employed to reconvert to string.
Python3
# Python3 code to demonstrate working of # Extract range characters from String # Using list comprehension # initializing string test_str = 'geekforgeeks is best' # printing original string print ( "The original string is : " + str (test_str)) # initializing range letters strt, end = "f" , "s" # join() to get result in string res = ''.join([ chr for chr in test_str if chr > = strt and chr < = end]) # printing result print ( "Extracted String : " + str (res)) |
The original string is : geekforgeeks is best Extracted String : gkforgksiss
Method #2 : Using filter() + lambda + join()
Another way to solve this, in this, we perform task of comparison using lambda, and filter() used lambda function to get required characters.
Python3
# Python3 code to demonstrate working of # Extract range characters from String # Using filter() + lambda + join() # initializing string test_str = 'geekforgeeks is best' # printing original string print ( "The original string is : " + str (test_str)) # initializing range letters strt, end = "f" , "s" # join() to get result in string res = ''.join( list ( filter ( lambda chr : chr > = strt and chr < = end, test_str))) # printing result print ( "Extracted String : " + str (res)) |
The original string is : geekforgeeks is best Extracted String : gkforgksiss