Teachers

# 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(arg):
    return(len(arg))

def num_courses(arg):
    x = 0
    for course in arg:
        x += len(arg[course])
    return(x)

def courses(arg):
    list_ = []
    for value in arg.values():
        list_ += value
    return(list_)

def most_courses(arg):
    list_nums = []
    list_keys = []

    for key in arg:
        list_nums.append(len(arg[key]))
        list_keys.append(key)

    return(list_keys[(list_nums.index(max(list_nums)))])

def stats(arg):
    stats_list = []

    for key in dict_:
        stats_list.append([key]+[len(arg[key])])

    return(stats_list)