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Python Python Collections (Retired) Dictionaries Teacher Stats

Posted by nvcxnvkldsjaklfds
nvcxnvkldsjaklfds
Courses Plus Student 5,041 Points

Can anyone here explain me this problem? I can't understand problem itself.

I can't understand the problem of creating stats function.

Please explain me

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(teachers):
    max_count = 0
    teacher = None
    for item in teachers.keys():
        if len(teachers[item]) > max_count:
            max_count = len(teachers[item])
            teacher = item
    return teacher

def num_teachers(teachers):
    return len(teachers)

def stats(teachers):
    list_stats = []
    for item in teachers:
        list_name = []
        list_name.append(item)
        list_name.extend(teachers[item])
        list_stats.append(list_name)
    return list_stats

1 Answer

Bart Bruneel
Bart Bruneel
27,212 Points
Bart Bruneel
Bart Bruneel
27,212 Points

Hello Karthikeyan,

for the moment your code is returning a list of lists of this form:

[[Teacher, class, class, ..., class], [Teacher, class, class, ...class], ...]

Your code should return something of this form:

[[Teacher, number of classes of this teacher], [Teacher, number of classes of this teacher], ...]

The key to the solution is thus looping over the teachers.keys() and appending first the name of the teacher to a new list_name initialized in the for-loop, then appending the length of teachers[teacher] to the list_name. Ultimately append the list_name to the lists_stats in the for-loop. Once out of the for-loop return lists_stats.

nvcxnvkldsjaklfds
nvcxnvkldsjaklfds
Courses Plus Student 5,041 Points

Thanks!