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

Posted by Soraia Carmo
Soraia Carmo
3,527 Points

Why not the same logic?

Hi!

Could someone explain why can't I use the same logic for this step as it was used for the first one?

Thank you

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(teacher_dict):
    num_keys = []
    for teachers in teacher_dict:
        num_keys.append(teacher_dict.keys())
    return len(num_keys)

def num_courses(teacher_dict):
    num_values = []
    for courses in teacher_dict:
        num_values.append(teacher_dict.values())
    return len(num_values)

1 Answer

Cooper Runstein
Cooper Runstein
11,850 Points
Cooper Runstein
Cooper Runstein
11,850 Points

This code won't work because each key only has one value in this example, an array that contains courses. So your array will contain one array per teacher, you need to figure out the length of each array within your num_values array to use that logic. It will work, it just takes one more step.

Soraia Carmo
Soraia Carmo
3,527 Points

Oh! That's right.. Didn't notice the values were in an array.

Thanks!