No error in code, but didn't get the answer. Wondering what is wrong

Q&A
#1

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My Code:

def get_key_list_dict(di, title):
    dict_by_title = {}
    for k,v in di[title].items():
        if v not in dict_by_title:
            dict_by_title[v] = [k]
        else:
            dict_by_title[v].append(k)
    return dict_by_title


def get_avg(di, title_as_key_dict):
    for k,v in title_as_key_dict.items():
        final_list = [0 for i in range(3)]
        for i in v:
            final_list[0] += di['total_bill'][i]
            final_list[1] += di['tip'][i]
            final_list[2] += di['size'][i]
        res[k] = [final_list[i]/len(v) for i in range(3)]
    return res

def avg_group(di, ke):
    res = {}
    a = get_key_list_dict(di,ke)
    return get_avg(di,a)

What I expected to happen:
Expected answer to be correct. Perhaps it has to do with rounding?

What actually happened:

did not return the expected value
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#2

Your current code will throw an error because you are trying to use res as a dictionary in your get_avg() function but don’t have it initialized in that function.

I would suggest sharing the code that works if the Grader says your working code isn’t returning the expected answer.

#3

Thank you so much! This solved my problem.

In my original code, I initiated res as a global variable and it didn’t work.

With your suggestion, I initiated res under get_avg and it worked! :slight_smile:

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