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

Siddharth Pande
Siddharth Pande
9,046 Points

tried everything but in vain

Wow, I just can't stump you! OK, two more to go. I think this one's my favorite, though.

Create a function named most_courses that takes our good ol' teacher dictionary.

most_courses should return the name of the teacher with the most courses. You might need to hold onto some sort of max count variable.

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(tree_dict):
    intr = len(tree_dict)
    return intr
def num_courses(tree_dict):
    values = list(tree_dict.values())
    count = 0
    for item in values:
        for i in item:
            count += 1
    return count
def courses(tree_dict):
    final_list =[]
    values = tree_dict.values()
    for item in values:
        for i in item:
            print(i)
            final_list.append(i)
    return final_list
def most_courses(tree_dict):
    value_list = []
    key_list = []
    for item in tree_dict.values():
        value_list.append(item)
    for item in tree_dict.keys():
        key_list.append(item)
    if len(value_list[0]) > len(value_list[1]):
        return key_list[0]
    elif len(value_list[0]) < len(value_list[1]):
        return key_list[1]
    else:
        return (key_list[0], key_list[1])

1 Answer

Steven Parker
Steven Parker
229,732 Points

Here's a few hints:

  • you don't need to create any additional lists
  • you should only need one loop
  • you've already counted courses in "num_courses"
  • this time, you can do something similar but also keep track of the highest count (and associated teacher)
  • after checking them all, return only the name of the teacher that had the most courses