Python | Remove the given substring from end of string

Last Updated : 07 Jun, 2019

Sometimes we need to manipulate our string to remove extra information from string for better understanding and faster processing. Given a task in which substring needs to be removed from the end of the string. Given below are a few methods to solve the given task.

Method #1: Using Naive Method

# Python3 code to demonstrate
# to remove a substring from end of the string
  
# Initialising string
ini_string = 'xbzefdgstb'
  
# initializing string
sstring = 'stb'
  
# printing initial string and substring
print ("initial_strings : ", ini_string, "\nsubstring : ", sstring)
  
# removing substring from end
# of string using Naive Method
if ini_string.endswith(sstring):
    res = ini_string[:-(len(sstring))]
  
# printing result
print ("resultant string", res)

Output:

initial_strings :  xbzefdgstb 
substring :  stb
resultant string xbzefdg

Method #2: Using sub() method

# Python3 code to demonstrate
# to remove a substring from end of string
  
import re
  
# Initialising string
ini_string = 'xbzefdgstb'
  
# initializing string
sstring = 'stb'
  
# printing initial string and substring
print ("initial_strings : ", ini_string, "\nsubstring : ", sstring)
  
# removing substring from end
# of string using sub Method
if ini_string.endswith(sstring):
    res = re.sub(sstring, '', ini_string)
  
# printing result
print ("resultant string", res)

Output:

initial_strings :  xbzefdgstb 
substring :  stb
resultant string xbzefdg

Method #3: Using replace() method

# Python3 code to demonstrate
# to remove a substring from end of string
  
# Initialising string
ini_string = 'xbzefdgstb'
  
# initializing string
sstring = 'stb'
  
# printing initial string and substring
print ("initial_strings : ", ini_string, "\nsubstring : ", sstring)
  
# removing substring from end
# of string using replace Method
if ini_string.endswith(sstring):
    res = ini_string.replace(sstring, '')
  
# printing result
print ("resultant string", res)

Output:

initial_strings :  xbzefdgstb 
substring :  stb
resultant string xbzefdg

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