Solution

[Martingj-ing]

Esta es la solución creada

[mateacademy-ai-mentor]

Review Summary

I am requesting changes because the core function count_occurrences in app/main.py is not implemented yet, which is a critical blocker. Right now the function body only contains the placeholder comment # write your code here and a pass, so it always returns None instead of the required integer count, causing all tests to fail. You need to remove the placeholder comment (the tests explicitly check that it is gone) and implement the logic to count how many times a given letter appears in the phrase in a case-insensitive way (for example, both "ABC", "a" and "letter", "t" should return the correct counts). A good approach is to convert both the phrase and the letter to the same case (e.g., .lower()) and then either use a loop to count matches or use a built-in method like str.count. Once implemented, rerun the tests and confirm that all example inputs from the task description produce the expected integer results. After fixing this, your solution should satisfy the functional requirements and the tests.

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[mateacademy-ai-mentor]

Review Summary

The implementation is approved. The count_occurrences function correctly implements all requirements: it uses Python's built-in str.count() method for efficiency, properly handles case-insensitivity by converting both phrase and letter to lowercase, and returns an integer count as expected. All test cases from the task description will pass with this implementation. Great work on removing the placeholder comment and having the function return the actual count instead of None.

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