Not quite sure where to start... this is what I made but I know it's not correct. Any help would be appreciated.

Question

Great work! OK, you're doing great so I'll keep increasing the difficulty.

For this step, make another new function named courses that will, again, take the dictionary of teachers and courses.

courses, though, should return a single list of all of the available courses in the dictionary. No teachers, just course names!

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.
treehouse_teachers = {'Andrew Chalkley': ['jQuery Basics', 'Node.js Basics'], 'Kenneth Love': ['Python Basics', 'Python Collections']}

def num_teachers(treehouse_teachers):
    return len(treehouse_teachers)

def num_courses(my_dict):
    count = 0
    for teacher in my_dict:
        count += len(my_dict[teacher])
    return count

def courses(treehouse_teachers):
    courses = []
    for values in treehouse_teachers.values():
        courses.append(treehouse_teachers.values())

Answer 1 · 2018-01-30T22:03:42Z

January 30, 2018 10:03pm

You're actually not too far off, you have the right idea but then it goes a bit wrong at this line:

courses.append(treehouse_teachers.values())

The first thing to note is that instead of accessing 'treehouse_teachers.values()' inside your loop, you should just access 'values', which is the list of courses by the current teacher in the loop. The next thing to note is that by using the append method, you'll end up with a list of lists. You might want to check out the extend method instead, as it extends the current list with the new elements, without any nesting.

Oh, and you'll want to remember to return the courses variable :)

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Nick Shannon

Nick Shannon

Not quite sure where to start... this is what I made but I know it's not correct. Any help would be appreciated.

1 Answer

Stuart Wright

Stuart Wright

Christian A. Castro

Christian A. Castro

Stuart Wright

Stuart Wright