#every other item
def oddTuples(aTup):
    '''
    aTup: a tuple
    
    returns: tuple, every other element of aTup. 
    '''
    return aTup[0:len(aTup):2]



#list functions
listA.sort()
listA.insert(0, 100)
listA.remove(3)
listA.append(7)
listA + listB
listB.sort()
listB.pop()
listB.count('a')
listB.remove('a')
listA.extend([4, 1, 6, 3, 4])
listA.count(4)
listA.index(1)
listA.pop(4)
listA.reverse()


animals.keys()
animals.values()


#returns largest key
def biggest(aDict):
    '''
    aDict: A dictionary, where all the values are lists.

    returns: The key with the largest number of values associated with it
    '''
    # Your Code Here
    if len(aDict) == 0:
        return None
    else:
        return max(aDict)
        
# Test: biggest({'b': [1, 7, 5, 4, 3, 18, 10, 0], 'a': []})