Stats unpacking method

Question

Whats wrong with my stats method? It seems that temp_list is incorrect but I don't know why... Thanks!

teachers.py

# The dictionary will look something like:
# {'Andrew Chalkley': ['jQuery Basics', 'Node.js Basics'],
#  'Kenneth Love': ['Python Basics', 'Python Collections']}
#
# Each key will be a Teacher and the value will be a list of courses.
#
# Your code goes below here.

def num_teachers(arg):
    return len(arg)

def num_courses(arg):
    count = 0
    for item in arg:
        count += len(arg[item])
    return count

def courses(arg):
    courses_offered = []
    for item in arg:
        courses_offered += arg[item]

    return courses_offered

def most_courses(arg):
    max_count = 0
    index = ""
    for item in arg:
        if len(arg[item]) > max_count:
            max_count = len(arg[item])
            index = item
    return index     

def stats(arg):
    unpacked = []
    for item in arg:
        temp_list = [item, num_courses(arg)]
        unpacked.extend(temp_list)

    return temp_list

Answer 1 · 2017-10-19T17:37:34Z

October 19, 2017 5:37pm

You can unpack dictionaries with the .items() method in a loop.

def stats(arg):
    answer = []
    for key, value in arg.items():
        teacher = [key, len(value)]
        answer.append(teacher)
    return answer

Welcome to the Treehouse Community

Looking to learn something new?

Mattan Yedidya

Mattan Yedidya

Stats unpacking method

1 Answer

Rich Zimmerman

Rich Zimmerman