Python: Matches a string that has an a followed by zero or one 'b'

Python Regular Expression: Exercise-4 with Solution

Write a Python program that matches a string that has an a followed by zero or one 'b'.

Sample Solution:

Python Code:

import re
def text_match(text):
        patterns = 'ab?'
        if re.search(patterns,  text):
                return 'Found a match!'
        else:
                return('Not matched!')

print(text_match("ab"))
print(text_match("abc"))
print(text_match("abbc"))
print(text_match("aabbc"))

Sample Output:

Found a match!                                                                                                
Found a match!                                                                                                
Found a match!                                                                                                
Found a match!

Pictorial Presentation:

Flowchart:

Python Code Editor:

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