天下枭雄燃文,解意怜君,逍遥人家
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
具体实现见代码：
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#!/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 DivideOp(Operator):
"""docstring for DivideOp"""
def GetResult(self):
try:
return float(float(self.NumberA) / float(self.NumberB) * 1.0)
except ZeroDivisionError as e:
print("DivideOp 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 DivideOp()
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 = ''
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