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Python Python Collections (Retired) Dictionaries Teacher Stats

Python Collection task 4:4

I cant seem to find whats wrong with my answer

teachers.py
# The dictionary will be something like:
# {'Jason Seifer': ['Ruby Foundations', 'Ruby on Rails Forms', 'Technology Foundations'],
#  'Kenneth Love': ['Python Basics', 'Python Collections']}
#
# Often, it's a good idea to hold onto a max_count variable.
# Update it when you find a teacher with more classes than
# the current count. Better hold onto the teacher name somewhere
# too!
#
# Your code goes below here.
def most_classes(my_dict):
    count = 0
    teacher = ""
    for key in my_dict: 
        if(len(my_dict[key]) > count):
            count = len(my_dict[key])
            teacher = key   
    return teacher

def num_teachers(my_dict):
    total = 0
    for key in my_dict:
        total += 1

    return total

def stats(my_dict):
    my_list = []
    for key in my_dict:
        new_list = []
        new_list.append(key)
        new_list.append(len(my_dict[key]))
        my_list.append(new_list)

    return my_list  

def courses(my_dict):
    my_list = []
    for value in my_dict.values():
        my_list.append(value)

    return my_list  

1 Answer

Brett Petersen
Brett Petersen
16,511 Points

Hi Tal,

Tricky one this one! In your courses function you're currently using the append method, and what that gives you in this case is actually a list of lists. The challenge, however, asks for a single list. Try replacing append with extend which will add the items of one list to the existing list.

Hope that helps!