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

Dylan Fried
Dylan Fried
3,123 Points
Posted by Dylan Fried
Dylan Fried
3,123 Points

Need help with task 2 in teachers.py

I was wondering if someone can give me a hint on what to do next. In my code I thought if I obtain the values of the dictionary and then converted it length; I'll be able to get the number of courses there are. However, the output was 2 but I need the output to be 4. How would I be able to count the number of courses for two lists inside a dictionary?

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.
Teachers = {"Andrew Chalkley": ["jQuery Basics", "Node.js Basics"], "Kenneth Love": ["Python Basics", "Python Collections"]}
def num_teachers(Teachers):
    Teach = Teachers.keys()
    numOfTeachers = len(Teach)
    return numOfTeachers

def num_courses(Teachers):
    course = Teachers.values()
    numOfCourse = len(course)
    return numOfCourse

1 Answer

Steven Parker
Steven Parker
231,007 Points
Steven Parker
Steven Parker
231,007 Points

The main thing is to consider that there will be only one "value" per teacher. But the values are lists, and the number you want will be the sum of number of items in each of the lists.

From there, you have a number of choices of implementation strategy, but the most basic might be a loop.