Introduction to the simple factory pattern of python3
This article mainly introduces the simple factory pattern of python3 design pattern in detail, which has certain reference value. Interested friends can refer to it
In the Python3 environment, debugging is implemented " The simple factory pattern in "Dahua Design Pattern" completes the instantiation of specific products by defining a separate factory class. Reference link
See the code for specific implementation:
#!/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 = ''The above is the detailed content of Introduction to the simple factory pattern of python3. For more information, please follow other related articles on the PHP Chinese website!
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