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Asked: 2024-09-26T23:44:20+05:30 In:

How to Extract and Reverse Long Comments from Code Blocks in Python?

So, I came across this interesting challenge about hidden easter eggs in code and I thought it would be fun to turn it into a little problem for you all to solve! The idea is all about trying to create a neat little function that can uncover these hidden treasures in code.

Imagine you’ve got a block of code, and within it, there are certain comments that contain fun little surprises — think of them as easter eggs. Your task is to write a function that scans through the code block and pulls out any comments that might be hiding something interesting.

Here’s the twist: instead of just finding all the comments, your function should only bring back the ones that are at least 15 characters long. Also, to make it a bit more challenging, you should return these comments in reverse order! So if the comments are scattered throughout the code, you should pull out the relevant ones, strip any leading or trailing whitespace, and then reverse the list before sending it back.

For instance, if your input is something like this:

“`python
# This function does something great!
def example():
pass # Another comment
# Don’t forget to add the eagles!

# Comment that’s too short
“`

Your function would return:

“`
[” eagles! Don’t forget to add the “, ” something great! This function does “]
“`

The key here is not to overthink it but to make sure your solution can effectively sift through the code and return only those juicy comments that fit the criteria. Bonus points if you can make your function resilient to different types of whitespace and comment styles!

I can’t wait to see what creative solutions you all come up with! Happy coding!

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    2 Answers

    1. def find_hidden_comments(code):
    import re
    
    # Using regex to find all comments
    comments = re.findall(r'#.*', code)
    
    # Filter comments to only those that are at least 15 characters long
    long_comments = [comment.strip() for comment in comments if len(comment.strip()) >= 15]
    
    # Reverse the list of filtered comments
    long_comments.reverse()
    
    return long_comments

# Example usage
code_example = '''
# This function does something great!
def example():
    pass  # Another comment
    # Don't forget to add the eagles!

# Comment that's too short
'''

print(find_hidden_comments(code_example))

    2. Code to Extract Hidden Comments

      Here’s a Python function that scans through a block of code, extracts comments that are at least 15 characters long, and returns them in reverse order. The function utilizes regular expressions to identify comments, ensuring robust handling of various whitespace characters:

      
def extract_hidden_comments(code_block):
    import re
    # Regex to find comments
    comments = re.findall(r'#(.*)', code_block)
    
    # Filter comments longer than 15 characters and strip whitespace
    filtered_comments = [comment.strip() for comment in comments if len(comment.strip()) >= 15]
    
    # Return the filtered comments in reverse order
    return filtered_comments[::-1]

# Example usage
code_snippet = '''
# This function does something great!
def example():
    pass  # Another comment
    # Don't forget to add the eagles!

# Comment that's too short
'''

result = extract_hidden_comments(code_snippet)
print(result)  # Output: ["  eagles! Don't forget to add the ", "  something great! This function does "]

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