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Python Python Collections (2016, retired 2019) Dictionaries Teacher Stats

teacher? or teachers? and course? or courses? Does it matter? and please help me understand why.......

Challenge Task 5 of 5 It's official: you're awesome at Python dictionaries! One last task and then you can take a well-deserved break!

In this last challenge, I want you to create a function named stats and it'll take our teacher dictionary as its only argument.

stats should return a list of lists where the first item in each inner list is the teacher's name and the second item is the number of courses that teacher has. For example, it might return: [["Kenneth Love", 5], ["Craig Dennis", 10]]

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(teachers):
    count = 0
    for teacher in teachers:
        count += 1
    return count

def num_courses(teachers):
    total = 0
    for value in teachers.values():
        for course in value:
            total += 1
    return total

def courses(teachers):
    result = []
    for courses in teachers.values():
        result += courses
    return result

def most_courses(teachers):
    max_count = 0
    professors = ""
    for teacher, course_list in teachers.items():
        if len(course_list) > max_count:
            max_count = len(course_list)
            professors = teacher
    return professors

def stats(teachers):
    name_list = []
    for teacher, course in teachers.items():
        name_list.append([teacher, len(course)])
    return name_list
Dane Parchment
Dane Parchment
Treehouse Moderator 11,077 Points

Can you please rephrase your question? I am having trouble understanding what it is you are asking for help with.

1 Answer

Alexander Besse
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.a{fill-rule:evenodd;}techdegree seal-36
Alexander Besse
Full Stack JavaScript Techdegree Graduate 35,115 Points

I believe what you're trying to ask is if the name of a variable matters during the execution of a script. Yes and no, the variable can be named whatever you want - as long as it referenced properly. If it's not referenced correctly, you'll get a NameError exception.

Hope this helps, happy coding!