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’]
Python | Lead and Trail String List Placeholder Python functions: Questions
Python | Lead and Trail String List Placeholder String Variables: Questions
