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Python Python Collections (Retired) Dictionaries Teacher Stats

FHATUWANI Dondry MUVHANGO
FHATUWANI Dondry MUVHANGO
17,796 Points
Posted by FHATUWANI Dondry MUVHANGO
FHATUWANI Dondry MUVHANGO
17,796 Points

please help

hi i'm just missing one thing. i need to join each name with a corresponding number of classes the teacher has in the required format. im struggling to figure how to do that

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(dictionary):
    most_classes_count = 0
    most_classes_teacher = None
    for teacher in dictionary:
        if len(dictionary[teacher]) > most_classes_count:
            most_classes_count = len(dictionary[teacher])
            most_classes_teacher = teacher
    return most_classes_teacher

def num_teachers(dictionary):
    list_t = []
    for teacher in dictionary:
        list_t.append(teacher)
    return(len(list_t))

def stats(dictionary):
    list_of_teacher = []
    number_of_classes = []
    for teacher in dictionary:
        list_of_teacher.append([teacher])
    for value in dictionary.values():
        number_of_classes.append(len(value))
    return list(list_of_teacher) + list(number_of_classes)

4 Answers

jacinator
jacinator
11,936 Points

Try changing append to extend.

jacinator
jacinator
11,936 Points
jacinator
jacinator
11,936 Points 
def stats(dictionary):
    list_of_teacher = []
    number_of_classes = []
    for teacher in dictionary:
        list_of_teacher.append([teacher])
    for value in dictionary.values():
        number_of_classes.append(len(value))
    return list(list_of_teacher) + list(number_of_classes)

What you are doing is getting a list of all the teachers and then a list of all the class counts. Then you are returning the concatenation of those two lists.

What they want is a list of lists, each of the sublists should have a teacher and a class count in it.

def stats(dictionary):
    teacher_class_list = []
    for teacher in dictionary:
        teacher_class_list.append([teacher, len(dictionary[teacher])])
    return teacher_class_list
FHATUWANI Dondry MUVHANGO
FHATUWANI Dondry MUVHANGO
17,796 Points
FHATUWANI Dondry MUVHANGO
FHATUWANI Dondry MUVHANGO
17,796 Points

thank you, it worked.

im doing the fourth question on the task, and this is my code: def courses(dictionary): teachers_courses = [] for values in dictionary.values(): teachers_courses.append(values) return teachers_courses

but it say that:"its getting 5 courses instead of 18", is there something wrong with my code?