Problems with list comprehensions

[nemoyatpeace]

I was attempting these lines of code:

        self.say(len(coins))
        bottom = [i for i in coins if i.pos.y <= 51-(13/17)*abs(i.pos.x-60)] 
        coins = [i for i in bottom if i.pos.x>self.pos.x]
        self.say(len(coins))

the first self.say worked fine, the second was broken.

I tried breaking both of the comprehensions into simple for loops and it worked fine:

        bottom = []
        for i in coins:
            if i.pos.y <= 51-(13/17)*abs(i.pos.x-60):
                bottom.append(i)
        coins = []
        for i in bottom:
            if i.pos.x>self.pos.x:
                coins.append(i)

When I tried it with the first comprehension and the second as a loop I got an error on i.pos.x complaining the null doesn't have a .pos.

        bottom = [i for i in coins if i.pos.y <= 51-(13/17)*abs(i.pos.x-60)] 
        coins = []
        for i in bottom:
            if i.pos.x>self.pos.x:
                coins.append(i)

I tried the other direction with the bottom as a list and the coins as a comprehension:

        bottom = []
        for i in coins:
            if i.pos.y <= 51-(13/17)*abs(i.pos.x-60):
                bottom.append(i)
        coins = [i for i in bottom if i.pos.x>self.pos.x]

And it worked. So apparently the issue is in the first comprehension.

[nwinter]

I'm going to guess that this is the same as the other bug with reusing list comprehension variable names: https://github.com/codecombat/aether/issues/133