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Python

Posted by Piyut Dyoni
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Piyut Dyoni
Android Development Techdegree Student 1,981 Points

Stop Iteration in Python

Hi, I am newbie in python and I dont know how to solve this..

population={'list_1':[0,2,3,4],'list_2':[2,0,4,1],'list_3':[1,6,0,8],'list_4':[3,5,6,0]}

item = [3,4,2,1]

def get_fitness(items):
    g= iter(items)
    temp=[]
    fitness_point=0
    try:
        for i in items:
            temp=population['list_{}'.format(i)]
            fitness_point+=temp[next(g)-1]
            print(temp[next(g)-1])
    except StopIteration:
        pass

    return fitness_point

print(get_fitness(item))

when I print, the result will be 8,3,5 but it is supposed to be 8,5,2 and 15 for fitness_point..

I dont know what to do, please help..

Andreas cormack
.a{fill-rule:evenodd;}techdegree seal-36
Andreas cormack
Python Web Development Techdegree Graduate 33,011 Points

Hi Piyut

How is the fitness points meant to be calculated??

population={'list_1':[0,2,3,4],'list_2':[2,0,4,1],'list_3':[1,6,0,8],'list_4':[3,5,6,0]}

item = [3,4,2,1]

def get_fitness(items):
    g= iter(items)
    temp=[]
    fitness_point=0
    try:
        for i in items:
            temp=population['list_{}'.format(i)] # till here i get what you are doing 
            fitness_point+=temp[next(g)-1] # not sure whats going on here. You seem to be getting the next line of the             #iteration ??
            print(temp[next(g)-1])
    except StopIteration:
        pass

    return fitness_point

print(get_fitness(item))

1 Answer

srikanth chavvakula
srikanth chavvakula
6,178 Points
srikanth chavvakula
srikanth chavvakula
6,178 Points

Hello Piyut,

Whats your objective in writing this program? It seems like you are a little off track in calculating the fitness points. Any specific criteria that you are using in this calculation? In other words, why are you expecting an output of 8,5,2 and 15? It will be helpful if you can briefly describe the objective of your program. In this process, you might actually solve your own problem.

Also, what are you exactly trying to print using this line - "print(temp[next(g)-1])" - that too in the middle of a function ??