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Python: Search some literals strings in a string

Python Regular Expression: Exercise-19 with Solution

Write a Python program to search some literals strings in a string.

Sample Solution:-

Python Code:

import re
patterns = [ 'fox', 'dog', 'horse' ]
text = 'The quick brown fox jumps over the lazy dog.'
for pattern in patterns:
    print('Searching for "%s" in "%s" ->' % (pattern, text),)
    if re.search(pattern,  text):
        print('Matched!')
    else:
        print('Not Matched!')
		

Sample Output:

Searching for "fox" in "The quick brown fox jumps over the lazy dog." ->                                      
Matched!                                                                                                      
Searching for "dog" in "The quick brown fox jumps over the lazy dog." ->                                      
Matched!                                                                                                      
Searching for "horse" in "The quick brown fox jumps over the lazy dog." ->                                    
Not Matched!

Pictorial Presentation:

Python: Regular Expression - Search some literals strings in a string.
Python: Regular Expression - Search some literals strings in a string.

Flowchart:

Flowchart: Regular Expression - Search some literals strings in a string.

Visualize Python code execution:

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Python Code Editor:

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Next: Write a Python program to search a literals string in a string and also find the location within the original string where the pattern occurs.

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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