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Python: Do a case-insensitive string replacement

Python Regular Expression: Exercise-44 with Solution

Write a Python program to do a case-insensitive string replacement.

Sample Solution:-

Python Code:

import re
text = "PHP Exercises"
print("Original Text: ",text)
redata = re.compile(re.escape('php'), re.IGNORECASE)
new_text = redata.sub('php', 'PHP Exercises')
print("Using 'php' replace PHP") 
print("New Text: ",new_text)

Sample Output:

Original Text:  PHP Exercises
Using 'php' replace PHP
New Text:  php Exercises

Pictorial Presentation:

Python: Regular Expression - Do a case-insensitive string replacement.

Flowchart:

Flowchart: Regular Expression - Do a case-insensitive string replacement.

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Python: Tips of the Day

Getting the last element of a list:

some_list[-1] is the shortest and most Pythonic.

In fact, you can do much more with this syntax. The some_list[-n] syntax gets the nth-to-last element. So some_list[-1] gets the last element, some_list[-2] gets the second to last, etc, all the way down to some_list[-len(some_list)], which gives you the first element.

You can also set list elements in this way. For instance:

>>> some_list = [1, 2, 3]
>>> some_list[-1] = 5 # Set the last element
>>> some_list[-2] = 3 # Set the second to last element
>>> some_list
[1, 3, 5]

Note that getting a list item by index will raise an IndexError if the expected item doesn't exist. This means that some_list[-1] will raise an exception if some_list is empty, because an empty list can't have a last element.

Ref: https://bit.ly/3d8TfFP