That is really a concern of seamless implementation. It is not a mandatory approach, though since each of the classes composed into this have their own __init__ method which may have additional parameters. The trick would be to have default parameters in the included class if the composite class does not have the parameters.
class Someclass:
def __init(a, b, c=1):
self.a = a
self.b = b
self.c = c
When instantiating said class, the third argument is optional.