On: Python 3.7: Introducing Data Classes

[UncleEntity]

Dynamic dispatching comes to mind.

  d = {Foo : do_something_with_foo,
       Bar : do_something_with_bar}

  d.get(type(x), default_function)(x)

Probably some more efficient way but honestly I've used this before instead of writing a whole if elif chain.

--edit--

Makes python's lack of a switch operator sometimes less painful...

[ianamartin → UncleEntity]

Oh, that makes sense. Not sure why this question rubbed people the wrong way. I was genuinely curious about when you would use an object as a key.

I guess my uses for dictionaries are pretty vanilla. But that’s a kind of thing I do all the time. I set up dictionaries where the key is a possible value from some operation or query, and the value is the function I want to perform on that value.

This extends that concept. Thanks!