Tests for Python Meltdown Mitigation exercise

Exercism Support Online Editor
1

Hello everyone!

I’m very new to coding, so I might be misunderstanding a very simple thing, but I’m having trouble with the second part of the Meltdown Mitigation Python exercise. The tests in the online editor return errors such as this:
AssertionError: None != ‘red’ : Called reactor_efficiency(10, 300, 10000). The function returned None, but the test expected red as the return value.

However, the next panel is Your Output that returns red. I’m not sure what the problem is, since it does seem to recognise the output of my code to be correct, but at the same time keeps insisting that it’s returning None? I’m attaching a screenshot of the relevant part of my code and the test output below.

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Is this an issue with the online editor, or am I just doing something wrong?

Thanks in advance!

2

Your function is printing output (print()) but not returning data (return). Similar to Hello World where you used return, the tests look at the returned data and not any printed output.

2 Likes
3

Oh right that fixed it :sweat_smile: Didn’t think about the difference at all - appreciate the help!