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Python | Reverse Slicing of given string

  • Last Updated : 04 Jul, 2019

Sometimes, while working with strings we might have a problem in which we need to perform the reverse slicing of string, i.e slicing the string for certain characters from the rear end. Let’s discuss certain ways in which this can be done.

Method #1 : Using join() + reversed()
The combination of above function can be used to perform this particular task. In this, we reverse the string in memory and join the sliced no. of characters so as to return the string sliced from rear end.




# Python3 code to demonstrate working of
# Reverse Slicing string 
# Using join() + reversed()
  
# initializing string 
test_str = "GeeksforGeeks"
  
# printing original string 
print("The original string is : " + test_str)
  
# initializing K 
K = 7
  
# Using join() + reversed()
# Reverse Slicing string 
res = ''.join(reversed(test_str[0:K]))
  
# printing result 
print("The reversed sliced string is : " + res)
Output :
The original string is : GeeksforGeeks
The reversed sliced string is : ofskeeG

 

Method #2 : Using string slicing
The string slicing can be used to perform this particular task, by using “-1” as the third argument in slicing we can make function perform the slicing from rear end hence proving to be a simple solution.






# Python3 code to demonstrate working of
# Reverse Slicing string 
# Using string slicing
  
# initializing string 
test_str = "GeeksforGeeks"
  
# printing original string 
print("The original string is : " + test_str)
  
# initializing K 
K = 7
  
# Using string slicing
# Reverse Slicing string 
res = test_str[(K-1)::-1]
  
# printing result 
print("The reversed sliced string is : " + res)
Output :
The original string is : GeeksforGeeks
The reversed sliced string is : ofskeeG

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