filter with dynamic value

[Achim Domma]

Hi,

I have something like this:

ids = [(1,'abc'),(2,'abc'),(3,'xyz'),(4,'xyz')]
comp = 'xyz'

now I want to use filter to remove all items from ids which don't have 'xyz'
as second value. I think the following should work:

filter(lambda x: x[1]=='xyz')

but how can I do this with an dynamic value ? If I try the following I get
problems with the scope of comp :

filter(lamdba x: x[1]==comp)

I think this can't be to complicated, but it seems that my C++ trained brain
hides once again the solution from me ...

greetings
Achim