Method # 1: Using split () + join ()
This is one way we can accomplish this task. In this, we break the elements apart and then return the last value and add a new element using join ().
| # Python3 code to demonstrate how it works
# Replace the trailing word in the line
# using split () + join ()
# initialization string test_str = " GFG is good "
# print original line print ( "The original string is:" + test_str)
# initialize string replacement rep_str = "best"
# Replace the backword in the line
# using split () + join () res = "" . join (test_str.split ( ’’ ) [: - 1 ] + [rep_str ])
# print result print ( "The String after performing replace:" + res) |
Output:
The original string is: GFG is good The String after performing replace: GFG is best
Method # 2: Using rfind () + join ()
A combination of these functions can also be used to accomplish this task. In this we perform the task of extracting the last word of a string using rfind () and join () is used to perform the replacement.
| # Python3 code to demonstrate how it works
# Replace the backword in the line
# using rfind () + join ()
# initialization string test_str = " GFG is good "
# print original line print ( "The original string is:" + test_str)
# initialize string replacement rep_str = "best"
# Replace the backword in the line
# using rfind () + join () res = test_str [: test_str.rfind ( ’ ’ )] + ’ ’ + rep_str
# print result print ( "The String after performing replace:" + res) |
Output:
The original string is: GFG is good The String after replace: GFG is best performing
