Python享元模式
Python享元模式
Python享元模式详细操作教程
享元模式属于结构设计模式类别。它提供了减少对象数量的方法。它包括有助于改善应用程序结构的各种功能。 flyweight对象的最重要特征是不可变的。这意味着它们一旦构造就无法修改。该模式使用HashMap来存储参考对象。
如何实现享元模式模式？
以下程序有助于实现flyweight模式-
# Filename : example.py
# Copyright : 2020 By Bianchenghao6
# Author by : bianchenghao6.com
# Date : 2020-08-22
class ComplexGenetics(object):
def __init__(self):
pass
def genes(self, gene_code):
return "ComplexPatter[%s]TooHugeinSize" % (gene_code)
class Families(object):
family = {}
def __new__(cls, name, family_id):
try:
id = cls.family[family_id]
except KeyError:
id = object.__new__(cls)
cls.family[family_id] = id
return id
def set_genetic_info(self, genetic_info):
cg = ComplexGenetics()
self.genetic_info = cg.genes(genetic_info)
def get_genetic_info(self):
return (self.genetic_info)
def test():
data = (('a', 1, 'ATAG'), ('a', 2, 'AAGT'), ('b', 1, 'ATAG'))
family_objects = []
for i in data:
obj = Families(i[0], i[1])
obj.set_genetic_info(i[2])
family_objects.append(obj)
for i in family_objects:
print("id = " + str(id(i)))
print(i.get_genetic_info())
print("similar id's says that they are same objects ")
if __name__ == '__main__':
test()
输出
上面的程序生成以下输出-
# Filename : example.py
# Copyright : 2020 By Bianchenghao6
# Author by : bianchenghao6.com
# Date : 2020-08-22
id = 4368211632
ComplexPatter[ATAG]TooHugeinSize
id = 4363253168
ComplexPatter[AAGT]TooHugeinSize
id = 4368211632
ComplexPatter[ATAG]TooHugeinSize
similar id's says that they are same objects