teacher stats last challange

# 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(str1):
    count1 = 0
    for key in str1:
        count1 += 1
    return count1   

def num_courses(str1):
    count2 = 0
    for value in str1.values():
        for items in value:
            count2 += 1
    return count2

def courses(str1):
    sow3 = []
    for value in str1.values():
        for items in value:
            sow3.append(items)
    return sow3

def most_courses(str1):
        dict4 = {}
        max4 = 0
        sow4 = ""
        maxi = 0
        for key in str1:
            for items in str1.values():
                max4 += 1
            dict4[key] = max4

        for key1 in dict4:
            if dict4[key1] > maxi:
                sow4 = key1 
                maxi = dict4[key1]
        return sow4

def stats(str1):
    listOver = []
    count = 0
    for key in str1:
        listInside = []
        listInside.append(key)
        for value in str1.vales():
            count += 1
        listInside.append(count)
        listOver.append(listInside)
    return listOver