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

lukeoberrieder3
lukeoberrieder3
2,261 Points

Bummer! Didn't get the right teacher name!

Just using the max() function to find the biggest dictionary in the dictionary of course. This works when I mess around with the teacher/course list. The test checker tells me that it doesn't get the right teacher name. Could someone explain what I need to do differently? 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(teachers_dict):
    teacher_counter = 0
    for key in teachers_dict.keys():
        teacher_counter += 1
    return(teacher_counter)
def num_courses(teachers_dict):
    total_course_list = []
    total_course_list_combined = []
    for x in teachers_dict:
        total_course_list.append(teachers_dict[x])
    for y in total_course_list:
        total_course_list_combined += y
    return(len(total_course_list_combined))
def courses(teachers_dict):
    total_course_list = []
    total_course_list_combined = []
    for x in teachers_dict:
        total_course_list.append(teachers_dict[x])
    for y in total_course_list:
        total_course_list_combined += y
    return(total_course_list_combined)
def most_courses(teachers_dict):
    return(str(max(teachers_dict)))

2 Answers

The max functions finds the "largest" key in the dictionary. In this case, it's returning the name of the teacher that comes last alphabetically. You should iterate through each teacher, count the number of courses for each teacher, and return the name of the teacher with the most courses.

This code takes a dictionary (dct), the name (name) of every teacher in the dictionary in turn, and assigns the list of that name to teacher. Then, it returns the length of teacher + 1. The last part is where you you want to check the number of items in dct Like this:

def num_teachers(dct):
  for name in dct: 
    teacher= dct[name] 
  return len(teacher) + 1;

def num_teachers(dct):
  return len(dct)