Python: Find sequences of lowercase letters joined with a underscore

Last update on March 31 2025 12:58:21 (UTC/GMT +8 hours)

7. Lowercase with Underscore

Write a Python program to find sequences of lowercase letters joined by an underscore.

Sample Solution:

Python Code:

import re
def text_match(text):
        patterns = '^[a-z]+_[a-z]+$'
        if re.search(patterns,  text):
                return 'Found a match!'
        else:
                return('Not matched!')

print(text_match("aab_cbbbc"))
print(text_match("aab_Abbbc"))
print(text_match("Aaab_abbbc"))

Sample Output:

Found a match!                                                                                                
Not matched!                                                                                                  
Not matched!

Pictorial Presentation:

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to find all sequences of lowercase letters joined by an underscore in a text.
• Write a Python script to extract and list all substrings that match the pattern of lowercase letters separated by an underscore.
• Write a Python program to identify and count all underscore-connected lowercase word sequences in a given string.
• Write a Python program to replace underscores with spaces in all sequences of lowercase letters found in a text.

Python Code Editor:

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