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

Posted by Idris Abdulwahab
Idris Abdulwahab
Courses Plus Student 2,961 Points

Get Key with maximum value in dictionary

My code is attached.

The problem is with the most_courses function. The code challenge was to return the name of the teacher with the maximum number of courses, which translates to the Key with the maximum value in the dictionary.

What I tried to do was to iterate through the values so that len(value) gives me number of courses in the value if in a list, while I get a figure of 1 if the value only holds a string.

But somehow, I got the whole thing confused when I try to obtain the max value.

Please help.

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(dict):
    num = len(dict.keys())
    return (num)

def num_courses(dict):
    count = 0
    for key, value in dict.items():
        if type(value) is list:
            count += len(value)
        else:
            count += 1
    return (count)

def courses(dict):
    good = []
    for key, value in dict.items():
        if type(value) is list:
            for item in value:
                good.append(item)
        else:
            good.append(value)
    return (good)

def most_courses(dict):
    count = 0
    for v in dict.values():
        if type(v) is list:
            count = len(v)
        else:
            count = 1
    maxcount = max((count) for v in dict.values())
    for k, v in dict.items():
        if count == maxcount:
            return (k)

1 Answer

Andrey Misikhin
Andrey Misikhin
16,529 Points
Andrey Misikhin
Andrey Misikhin
16,529 Points 
def most_courses(dict):
    count = 0
    name = ''
    for teacher, course in dict.items():
        if type(course) is list and len(course) >= count:
            name = teacher
        elif count == 0:
            name = teacher
    return name