I don't get why none of the things I try wont pass.

Question

I really am not understanding how to iterate through the values in the dict.

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):
    count = 0
    for amount in teachers.keys():
        count += 1

    return count



def num_courses(teachers):
    count = 0
    for amount in teachers.value():
        for value in teacher[amount]:
        count += 1

    return count

Answer 1 · 2017-12-11T00:09:31Z

December 11, 2017 12:09am

A couple things:

You want the method named values not value on the teachers dictionary.
looking at the sample data, each of those values is a list. You're calling that variable amount, but you don't have an amount yet, you just have a list. You need to get the length of the list. Here is my solution:

def num_courses(teachers):
    count = 0
    for courses in teachers.values():
        count += len(courses)
    return count

The treehouse challenges don't give you very good error messages. ("Bummer! Try again!"). Sometimes it's a good idea to take the problem and do it in an environment where you see the specific detailed error messages from Python, or you can print out variables to the console and debug, whether that's a Treehouse workspace or your own text editor and terminal.

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Damian McCarthy

Damian McCarthy

I don't get why none of the things I try wont pass.

1 Answer

Brendan Whiting

Brendan Whiting