Python | Add substring at specific index

Michael Zippo 18.07.2021

👻 Check our latest review to choose the best laptop for Machine Learning engineers and Deep learning tasks!

Method # 1: Using List Slicing

This task can be accomplished using List Slicing. In doing so, we simply slice the list in two, splitting at the target position and then rejoining it after inserting the target substring in the middle.

# Python3 demo code
# Add a substring at a specific index
# using list slicing

# initialization string

test_string = ’geeksgeeks’

# initializing add_string

add_string = "for"

#print original strings

print ( "The original string : " + test_string)

# print add line

print ( "The add string:" + add_string)

# initialization N

N = 5

# using list slicing
# Add a substring at a specific index

res = test_string [: N] + add_string + test_string [N:]

# print result

print ( "The string after performing addition:" + str (res))

Output:

 The original string: geeksgeeks The add string: for The string after addition: pythonengineering

Method # 2: Using join () + list () + insert ()

Another possible hack that can be done for the next problem is to convert the string to a list and append the string at a specific position and then do the join.

       # Python3 demo code  
  # Add a substring at a specific index  
  # using join ( ) + list () + insert ()  
  
  # initializing string  
   test_string   =   ’geeksgeeks’  
  
  # initializing add_string  
   add_string   =   "for"  
  
  # print original line  
   print   (  "The original string:"   +   test_string) 
  
  # print add line  
   print   (  "The add string:"   +   add_string) 
  
  # initialization N  
   N   =   5  
  
  # using join () + list () + insert ()  
  # Add a substring at a specific index   
  res   =   list   (test_string) 
   res.insert (N, add_string) 
   res   =   ’’ .join (res) 
  
  # print result  
   print   (  "The string after performing addition:"   +   str   (res))

Exit:

 The original string: geeksgeeks The add string: for The string after performing addition: pythonengineering

👻 Read also: what is the best laptop for engineering students?

We hope this article has helped you to resolve the problem. Apart from Python | Add substring at specific index, check other code Python module-related topics.

Want to excel in Python? See our review of the best Python online courses 2023. If you are interested in Data Science, check also how to learn programming in R.

By the way, this material is also available in other languages:

Chen OConnell

Milan | 2023-03-29

test Python module is always a bit confusing 😭 Python | Add substring at specific index is not the only problem I encountered. I am just not quite sure it is the best method

Davies Robinson

New York | 2023-03-29

Maybe there are another answers? What Python | Add substring at specific index exactly means?. I just hope that will not emerge anymore

Manuel Emmerson

Prague | 2023-03-29

Strings PHP module is always a bit confusing 😭 Python | Add substring at specific index is not the only problem I encountered. I just hope that will not emerge anymore