Code Challenge: Teacher stats (Task 4/5)

# 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(argum):
    count = 0
    for key in argum.keys():
        count += 1
    return count

def num_courses(argum):
    count = 0
    for value in argum.values():
        for valu in value:
            count += 1
    return count

def courses(argum):
    lista = []
    for value in argum.values():
        for valu in value:
            lista.append(valu)
    return lista

def most_courses(argum):
    max_count = 0  #reset max counter
    name = ""  #set default name value
    for key in argum.keys():   #go through each key and reset counter 
        count = 0
        for value in argum[key]:   #go through each key's value and count all values
            count += 1
        if count > max_count:   #could be >= if we exclude elif from below and just pick up last teacher with same max_count as some previous teacher
            max_count = count
            name = key
#        elif count == max_count:  Add these lines if we want to avoid no max_count(people having same max_count)
#            name = None
    return name