# Functions in python are first-class objects ie behave like any other objects (ints, strings, ...)
def empty():
    "empty function"
    pass

if '__main__' == __name__:
    # function <empty> can be passed on to another function (without ever calling <empty>)
    # dir() returns a list of all properties of an object
    # Using it we can inspect all of empty's properties
    print(dir(empty))
    # >>> ['__annotations__', '__builtins__', '__call__', ...]

    # Note-worthy properties:
    # name of the function
    print(empty.__name__)
    # >>> empty

    # function's docstring
    print(empty.__doc__)
    # >>> empty function