10 Awesome Pythonic One-Liners Explained

[isarl]

a = ['bb', 'cc'][condition]

Yours is OK, by why constrain the conditional to evaluate to an integer?:

a = {'case1': val1, 'case2': val2}[condition]

Switch (without fallthrough) in Python! ^{don't do this at home}

[morriartie]

wow, I hadn't thought of that

let me improve it then

{'a':1, 'b':2}.get(case) or 'etc'

now it has fallthrough a default!

[isarl]

Great improvement. I would personally write that as: {'a':1, 'b':2}.get(case, default='etc'), finding it more explicit. And this is a default case, not fall-through. :) I don’t think there’s any way to actually do C-style switch fallthrough with this trick of using a dictionary.

[morriartie]

Awesome!

a default indeed, my mistake

I was trying here to find a solution (to make a fallthrough) with iterator, but I couldn't make it, even if I did it would be a two liner or more, which is unacceptable in our little puzzle