Hi Ana Cristina,

✅ You implemented the function to read and display a file.
✅ You completed the patient_summary() function to summarize a file.
⚠️ You implemented the detect_problems() function to check the file.

⚠️ The detect_problems() function is expected to return a Boolean variable (True / False). However, in your current version and the test case, it is returning None instead. Could you please check your implementation and identify why this is not working as expected?

Please revise your current submission to address the ⚠️ issue(s).

Thanks,
Tianyi [LS]

Thank you for revising your submissions.

In your current version, you replaced return with return bool(). Your thoughts is almost correct, but it just needs a small touch to make it work properly.

bool() is a Python built-in function that converts its input to a Boolean variable. Therefore, when we write bool() without any input, it always returns False. In your detect_problem() function, if you return bool(), False will always be returned regardless of the results of check_zeros(). To check this, you may try running your current version with the following code:

for f in all_paths:
    print(detect_problems(f))

You should see three True's.

The provided helper function check_zeros() returns the result of len(flag) > 0. In Python, this statement is evaluated as either True or False based on the content of a file (whether it contains all-zero rows), i.e., the returned value of check_zeros() is a Boolean variable.

Based on my comment, can you think about what should be returned by the detect_problem() function?

The updated version looks good! One minor comment is since you're returning check_zeros(), there is no need to run the function twice.

You may either use a variable to save the result and return the variable:

checked = check_zeros(data_mean) 
return checked

Or directly return the function (return the return):

# check_zeros(data_mean)  # <- we don't need this 
return check_zeros(data_mean)

🎉 Your A2 is complete!
🎊 All your Python assessments are now complete. Thank you for your participation, and I wish you all the best for your future!

Tianyi [LS]