That one wasn't too bad, right? Let's try something a bit more challenging. Create a new function named num_courses tha

Question

i don't know where i am going wrong on this one

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(teachers):
    teacher_count = 0
    for teacher in teachers:
        teacher_count +=1    
    return teacher_count

def num_courses(courses):
    total_courses = 0
    for course in courses.values():
        total_courses +=1

    return total_courses

Answer 1 · 2018-02-28T03:04:02Z

February 28, 2018 3:04am

Within the courses dictionary there are keys and values. Each value in the courses dictionary happens to be a list. The code you currently have, is counting the number of lists in the dictionary rather than the items in each list.

For example, the dictionary given in the comments at the top of the challenge has 2 values (lists): ['jQuery Basics', 'Node.js Basics'] and ['Python Basics', 'Python Collections']. Your code would therefore return total_courses count of 2.

Instead of:

    for course in courses.values():
        total_courses +=1

    return total_courses

Think of it like:

    for each_list in courses.values():
        # iterate through each list and update total_courses count

    return total_courses

You could add a second 'for loop' nested inside of your first to iterate through each list and update total_courses.

Hope this helps. Let me know if you're still having trouble.

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mamadou diene

mamadou diene

That one wasn't too bad, right? Let's try something a bit more challenging. Create a new function named num_courses tha

1 Answer

Pete P

Pete P