input: Write a python function to create a dictionary from two lists.
  assert dictfromlists(["a", "b", "c", "d"], [1, 2, 3, 4]) == {'a': 1, 'b': 2, 'c': 3, 'd': 4}
  assert dictfromlists(["x", "y", "z"], [9, 8, 7]) == {'x': 9, 'y': 8, 'z': 7}
  assert dictfromlists([], []) == {}
output: def dictfromlists(keys, values):
      return dict(zip(keys, values))