Python design mode (9)-Appearance mode

#/* Appearance mode: Provides a unified interface for external calls and extracts the methods needed in other classes
#  * out, called by the skin class. The skin class is then instantiated in the call segment to indirectly invoke the required
#  * method. This approach is similar to the proxy model. However, according to the Dimitri Law, the agent
#  * Patterns should be proxied as much as possible for a single object. And the appearance pattern is more like extracting from many classes.
#  * A useful method to combine into a new class */

Class Invoke1:
    def methon1 (self):
        print ' Call 1 '


Class Invoke2:
    def methon2 (self):
        print ' Call 2 '


Class Invoke3:
    def methon3 (self):
        print ' Call 3 '


Class FACDE:
    def __init__ (self):
        SELF.A = Invoke1 ()
        self.b = Invoke2 ()
        SELF.C = Invoke3 ()

    def unit1 (self):
        Self.a.methon1 ()
        Self.b.methon2 ()
        Self.c.methon3 ()

    def unit2 (self):
        Self.a.methon1 ()
        Self.b.methon2 ()


if __name__ = = "__main__":
    FACDE = FACDE ()
    Facde.unit1 ()
    Facde.unit2 ()

Python design mode (9)-Appearance mode