Understand errors
Describe an error or unexpected output and get a plain-language explanation of what may be causing it.
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practice.pyPython
A small bug. A useful lesson.
def average(numbers): total = sum(numbers) return total / len(number) scores = [70, 85, 90] print(average(scores))
✦ Mentor explanation
Likely issue: the function receives numbers, but the return line uses number. Those names do not match. Use len(numbers) to count the items in the list.
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CodeMentor AI is designed to help learners understand what went wrong and what to practise next—not just copy a fix.
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Keep API keys out of code
The starter project is designed to read its Anthropic API key from an environment variable rather than hard-coding it.
A simple workflow
From confusion to clarity.
Focus the conversation on the specific thing you want to understand.
01
Share the problem
Choose a help mode and language, then paste a code snippet and explain what you expected to happen.
02
Explore the explanation
Use the AI-generated response to examine the likely issue, suggested correction, and relevant concept.
03
Practise the concept
Apply the idea to your code, test the result, and use follow-up questions to deepen your understanding.
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