这篇文章主要为大家详细介绍了python3设计模式之简单工厂模式，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
在python3环境下，调试实现了《大话设计模式》中简单工厂模式，通过定义单独的工厂类，完成对具体的产品的实例化,参考链接
具体实现见代码：
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# date : 2017-10-15 21:46:28
# author : john
# version : v1.001
# func :
class operator(object):
"""docstring for operator"""
def __init__(self, numbera=0, numberb=0):
super(operator, self).__init__()
self.numbera = numbera
self.numberb = numberb
def getresult(self):
pass
class addop(operator):
"""docstring for addop"""
def getresult(self):
return int(float(self.numbera) + float(self.numberb))
class minusop(operator):
"""docstring for minusop"""
def getresult(self):
return int(float(self.numbera) - float(self.numberb))
class multiop(operator):
"""docstring for multiop"""
def getresult(self):
return int(float(self.numbera) * float(self.numberb))
class pideop(operator):
"""docstring for pideop"""
def getresult(self):
try:
return float(float(self.numbera) / float(self.numberb) * 1.0)
except zeropisionerror as e:
print("pideop error, {0}".format(e))
class operatorfactory(object):
"""docstring for operatorfactory"""
def chooseoperator(self, op):
if op == '+':
return addop()
if op == '-':
return minusop()
if op == '*':
return multiop()
if op == '/':
return pideop()
if __name__ == '__main__':
ch = ''
while not ch == 'q':
numbera = input('please input numbera: ')
op = input('please input operator: ')
numberb = input('please input numberb: ')
factory = operatorfactory()
optype = factory.chooseoperator(op)
optype.numbera = numbera
optype.numberb = numberb
print('the result is: {0}'.format(optype.getresult()))
print('\n#-- input q to exit any key to continue')
try:
ch = str(input())
except exception as e:
print('get input error: {0}'.format(e))
print('use default value to ch')
ch = ''
以上就是python3之简单工厂模式的介绍的详细内容。