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Python Python Collections (Retired) Dictionaries Teacher Stats

Sergei Miroshnikov
Sergei Miroshnikov
3,313 Points

Vague error message with correct output .

I am getting error message with exactly same output as requested :( . I would love to solve this but I do not understand what is wrong .

def most_classes(teachers_dict):
    result_disct = {}
    maxValue = 0
    for key in teachers_dict:
        if len(teachers_dict[key]) > maxValue:
            maxValue = len(teachers_dict[key])
            result_disct = {key: len(teachers_dict[key])}

    return list(result_disct.keys())[0]


def num_teachers(teachers_dict):
    teachercounter = 0
    for key in teachers_dict:
        teachercounter += 1
    return teachercounter

def stats (teachers_dictionary):
  return list (result)

def stats(x):
    teacher_list =[]
    for key in x:
        teacher_list.append(key)
        teacher_list.append(len(x[key]))
    return teacher_list

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,426 Points

Your code isn't returning exactly what is expected. The challenge is asking for a list of lists, where each contained list has the teacher name and the course count: [['teacher1', 3], ['teacher2', 7], ...]

You can achieve this by combining your two append statements:

## Change ##

        teacher_list.append(key)
        teacher_list.append(len(x[key]))

## to ##

        teacher_list.append([key, len(x[key])])