Question

Having a problem with a code for homework. Basically what I’m trying to do is take in a list of objects and pass them to my fire method.

def fire(self,targets):
    i = 0
    for i in targets:
        x,y = targets[i].position
        tx,ty = self.position
        d = getDist(targets[i].position, self.position)

Whenever I call the fire method and pass in the objects it points me to line 17 which is the x,y = targets[i].position line and says “TypeError: list indices must be integers, not Bomber”

Bomber is the name of the class. I call the fire method like this:

bOne.fire([bTwo, tOne, tTwo, tThree])

Any help is much appreciated.

Answer 1

You are looping over the list itself, which means you don’t need to use the values as an index:

>>> for elem in ['a', 'b', 'c']:
...     print elem
'a'
'b'
'c'

In python, the for construct doesn’t work just with numbers, it works directly with the elements of the sequence you are looping over.