Python设计模式之建造者模式实例详解

#!/usr/bin/env python
# -*- coding:utf-8 -*-
__author__ = 'Andy'
"""
大话设计模式
设计模式――建造者模式
建造者模式(Builder):将一个复杂对象的构建与它的表示分离,使得同样的构建过程可以常见不同的表示
特性: 指挥者(Director) 指挥 建造者(Builder) 建造 Product
"""
import abc
class Builder(object):
  __metaclass__ = abc.ABCMeta
  @abc.abstractmethod
  def create_header(self):
    pass
  @abc.abstractmethod
  def create_body(self):
    pass
  @abc.abstractmethod
  def create_hand(self):
    pass
  @abc.abstractmethod
  def create_foot(self):
    pass
class Thin(Builder):
  def create_header(self):
    print '瘦子的头'
  def create_body(self):
    print '瘦子的身体'
  def create_hand(self):
    print '瘦子的手'
  def create_foot(self):
    print '瘦子的脚'
class Fat(Builder):
  def create_header(self):
    print '胖子的头'
  def create_body(self):
    print '胖子的身体'
  def create_hand(self):
    print '胖子的手'
  def create_foot(self):
    print '胖子的脚'
class Director(object):
  def __init__(self, person):
    self.person = person
  def create_preson(self):
    self.person.create_header()
    self.person.create_body()
    self.person.create_hand()
    self.person.create_foot()
if __name__=="__main__":
  thin = Thin()
  fat = Fat()
  director_thin = Director(thin)
  director_fat = Director(fat)
  director_thin.create_preson()
  director_fat.create_preson()