Question

Possible Duplicate:
Finding the index of a list in a loop

Assume you have a list, where not just the values have meaning, the index has, too.

counts = [3,4,5,3,1]

Let’s say that means “we have 3 objects of type zero, 4 objects of type 1 and so on”.

You want to create a list of objects from that and give these objects both information details:

[CountObject(amount=a,type=???) for a in counts]

How would you do that?

Answer 1

Use the enumerate() function:

[CountObject(amount=a, type=i) for i, a in enumerate(counts)]

where i is then the index.