Change language

Python | Lead and Trail String List Placeholder

|

Method # 1: Using List Comprehension

This task can be accomplished using List Comprehension. In this, we iterate over each inline element and restore a new list of lines after adding the required line to the back and front of each line.

# Python3 demo code
# Trail and leading list of strings
# using comprehension list

 
# initialize the list

test_list = [ "a" , "b" , "c" ]

 
# print the original list

print ( "The original list:" + str (test_list))

 
# initialize pad_str

pad_str = ’gfg’

  
# Trail and leading list of strings
# using comprehension list

res = [pad_str + ele + pad_str  for ele in test_list]

  # print result

print ( "The String list after padding:" + str (res))

Output:

 The original list: [’a’,’ b’, ’c’] The String list after padding: [’ gfgagfg’, ’gfgbgfg’,’ gfgcgfg’] 

Method # 2: Using comprehension list + string formatting

This task can also be accomplished using a combination of the above functions. In this we accomplish the padding task using a formatted string than the + operator.

# Python3 code to demonstrate how it works
# Trail and leading list of lines
# use comprehension list + line formatting

  
# initialize the list

test_list = [ "a" , "b" , "c" ]

  
# print original list

print ( "The original list:" + str (test_list))

 
# initialize pad_str

pad_str = ’gfg’

 
# Trail and leading list of lines
# using comprehension list + string formatting

temp = pad_str + ’ {0} ’ + pad_str

res =   [temp. format (ele) for ele in test_list]

 
# print result

print ( "The String list after padding:" + str (res))

Output:

 The original list: [’a’,’ b’, ’c’] The String list after padding: [’ gfgagfg’ , ’gfgbgfg’,’ gfgcgfg’] 

Shop

Learn programming in R: courses

$

Best Python online courses for 2022

$

Best laptop for Fortnite

$

Best laptop for Excel

$

Best laptop for Solidworks

$

Best laptop for Roblox

$

Best computer for crypto mining

$

Best laptop for Sims 4

$

Latest questions

NUMPYNUMPY

Common xlabel/ylabel for matplotlib subplots

12 answers

NUMPYNUMPY

How to specify multiple return types using type-hints

12 answers

NUMPYNUMPY

Why do I get "Pickle - EOFError: Ran out of input" reading an empty file?

12 answers

NUMPYNUMPY

Flake8: Ignore specific warning for entire file

12 answers

NUMPYNUMPY

glob exclude pattern

12 answers

NUMPYNUMPY

How to avoid HTTP error 429 (Too Many Requests) python

12 answers

NUMPYNUMPY

Python CSV error: line contains NULL byte

12 answers

NUMPYNUMPY

csv.Error: iterator should return strings, not bytes

12 answers

News


Wiki

Python | How to copy data from one Excel sheet to another

Common xlabel/ylabel for matplotlib subplots

Check if one list is a subset of another in Python

sin

How to specify multiple return types using type-hints

exp

Printing words vertically in Python

exp

Python Extract words from a given string

Cyclic redundancy check in Python

Finding mean, median, mode in Python without libraries

cos

Python add suffix / add prefix to strings in a list

Why do I get "Pickle - EOFError: Ran out of input" reading an empty file?

Python - Move item to the end of the list

Python - Print list vertically