Dictionary lookups exercise (PyBite #109)

[ndc85430]

Testing, testing. testing. That is what one needs to do when writing code. So I strongly advise to temporarily add a line to your code so you can see the result. Not needed to run the full assertion test every time, too much output.

If there are unit tests, they should be run. That's the point of them! If there's too much output, there's something wrong. You should see if the tests have passed, or in the case of the failure, why the assertion failed, etc.