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

Posted by Mathew Yangang
Mathew Yangang
4,433 Points

returning the sum total from a dictionary

I need to return the total from a dictionary, but i'm not sure what method to use

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(dictionary):
    teachers = len(dictionary)
    return teachers

def num_courses(dictionary):

1 Answer

Alexander Davison
Alexander Davison
65,469 Points
Alexander Davison
Alexander Davison
65,469 Points

Unfortunately, there no built-in Python method for this task. You need to use a loop that iterates through the values of the dictionary and increment some variable by the length of each value (they are lists, so you can take the length of them)

Mathew Yangang
Mathew Yangang
4,433 Points

Thanks Alexander

Alexander Davison
Alexander Davison
65,469 Points

No problem :)

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