Filip GruszczyƄski wrote:
I have just written a very small snippet of code and started thinking,
which version would be more pythonic. Basically, I am adding a list of
string to combo box in qt. So, the most obvious way is:

for choice in self.__choices:
        choicesBox.addItem(choice)

But I could also do:

map(self.__choices, choicesBox.addItem)

or

[choicesBox.addItem(choice) for choice in self.__choices]

I guess map version would be fastest and explicit for is the slowest
version. However, the first, most obvious way seems most clear to me
and I don't have to care about speed with adding elements to combo
box. Still, it's two lines instead of one, so maybe it's not the best.
So, which one is?

Is .addItem() a function (returns a result) or a procedure (called
for its side-effect, ie adding an item to a collection)?

It's a procedure, so the first form is Pythonic.

If it was a function then the third form would be Pythonic.

The second form is what you would've done before list comprehensions
were introduced.
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