Using 'in' to match an attribute of Python objects in an array

Question

I don\'t remember whether I was dreaming or not but I seem to recall there being a function which allowed something like,

foo in iter_attr(array of python ob         


        

Answer 1

What I was thinking of can be achieved using list comprehensions, but I thought that there was a function that did this in a slightly neater way.

i.e. 'bar' is a list of objects, all of which have the attribute 'id'

The mythical functional way:

foo = 12
foo in iter_attr(bar, 'id')

The list comprehension way:

foo = 12
foo in [obj.id for obj in bar]

In retrospect the list comprehension way is pretty neat anyway.