'''
20210917

Robin Dawes
'''

def count_memberships(list_of_lists, target):
   '''takes a list of lists and an object (any type)
          returns the number of lists the object is in
          returns -1 if there is a problem with the list of lists'''
   count = 0
   if type(list_of_lists) is not list:
      return -1
   else: 
      for a_list in list_of_lists:
         if type(a_list) is not list:
            return -1
         elif target in a_list:
            count += 1
      return count
   
   
   
list1 = [1, 2, 4, 8]
list2 = ['a', 'b', 8, 'dog', 'cat', False]
list3 = ['salt', 'pepper', 'oregano', "za'atar", "basil", "turmeric"]
list4 = ['basil', False, list1]
list5 = [8, 8, 8, 8]
some_lists = [list1, list2, list3, list4, list5]

def test_count_memberhips_1():
    assert count_memberships(some_lists, 8) == 3
   
def test_count_memberships_2():   
   assert count_memberships([[],[1]], 1) == 1
   
def test_count_memberships_3():
   assert count_memberships(list5, 8) == -1
   
def test_count_memberships_4():
   assert count_memberships([list1,4], 4) == -1
   
def test_count_memberships_5():
   assert count_memberships(some_lists, "basil") == 2
   
def test_count_memberships_6():
   assert count_memberships(1, 4) == -1