Another one of those that’s mainly for my own notes. I needed to create a mock object that always a returns an empty list no matter what method is called on it. That is, you can instantiate one of these and call any made up method on it and get an empty list back. Here is it:

class Dummy:
	def __getattr__(self, name): return lambda *args: []
d = Dummy()
d.something()   # returns []
d.something_else("a",1,"b")   # returns []