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) |
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) |
The original string is : GeeksforGeeks The reversed sliced string is : ofskeeG
Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.
To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course.
Python | Reverse Slicing of given string倒排并切割字符串
原文：https://www.cnblogs.com/weifeng1463/p/14667394.html