__doc__ = u"""

  >>> c = CoconutCarrier()

  >>> c.swallow(name = "Brian")

  This swallow is called Brian

  >>> c.swallow(airspeed = 42)

  This swallow is flying at 42 furlongs per fortnight

  >>> c.swallow(coconuts = 3)

  This swallow is carrying 3 coconuts

"""

class CoconutCarrier:

    def swallow(self, name = None, airspeed = None, coconuts = None):

        if name is not None:

            print u"This swallow is called", name

        if airspeed is not None:

            print u"This swallow is flying at", airspeed, u"furlongs per fortnight"

        if coconuts is not None:

            print u"This swallow is carrying", coconuts, u"coconuts"