python simple factory mode example

# -*- coding: utf-8 -*-
"""
OperationFactory.py
This is a simple python3 factory mode example for operation
Created on Thu Sep 20 14:53:22 2018
"""
__author__="lyp"

class Operation:
    def __init__(self,Num1,Num2):
        self.Num1=Num1
        self.Num2=Num2

class OperationAdd(Operation):
    def __init__(self,Num1,Num2):
        Operation.__init__(self,Num1,Num2)
    def result(self):
        return(self.Num1+self.Num2)
   
class OperationSub(Operation):
    def __init__(self,Num1,Num2):
        Operation.__init__(self,Num1,Num2)
    def result(self):
        return(self.Num1-self.Num2)
        
class OperationMul(Operation):
    def __init__(self,Num1,Num2):
        Operation.__init__(self,Num1,Num2)
    def result(self):
        return(self.Num1*self.Num2)
        
class OperationDiv(Operation):
    def __init__(self,Num1,Num2):
        Operation.__init__(self,Num1,Num2)
    def result(self):
        if self.Num2==0:
            raise ValueError("Num2 can‘t be 0!!!")
        else:
            return(self.Num1/self.Num2)
            
class OperationFactory:
    def __init__(self):
        pass
    def create_operation(self,string_operate):
        self.string_operate=string_operate
        if self.string_operate=="+":
            return(OperationAdd)
        elif self.string_operate=="-":
            return(OperationSub)
        elif self.string_operate=="*":
            return(OperationMul)
        elif self.string_operate=="/":
            return(OperationDiv)
        else:
            raise ValueError("Operator Error!!!")

def main():
    Add=OperationFactory().create_operation("+")
    value=Add(1.0,2).result()
    print("Add value is: {}".format(value))
    Sub=OperationFactory().create_operation("-")
    value=Sub(1.0,2).result()
    print("Sub value is: {}".format(value))
    Mul=OperationFactory().create_operation("*")
    value=Mul(1.0,2).result()
    print("Mul value is: {}".format(value))
    Div=OperationFactory().create_operation("/")
    value=Div(1.0,2).result()
    print("Div value is: {}".format(value))
   
if __name__=="__main__":
    main()
    
            

Add value is: 3.0
Sub value is: -1.0
Mul value is: 2.0
Div value is: 0.5

# -*- coding: utf-8 -*-
"""
ConnectorFactory.py
"""
__author__="lyp"
import json
import xml.etree.ElementTree as etree

class jsonconnector:
    def __init__(self,filepath):
        self.data=[]
        with open(filepath,mode=‘r‘,encoding=‘utf-8‘) as f:
            self.data=json.load(f)
            
    def parsed_data(self):
        return self.data
    
class xmlconnector:
    def __init__(self,filepath):
        self.tree=etree.parse(filepath)
        
    def parsed_data(self):
        return self.tree
    
def connector_factory(filepath):
    if filepath.endswith(‘json‘):
        connector=jsonconnector
    elif filepath.endswith(‘xml‘):
        connector=xmlconnector
    else:
        raise ValueError(‘Cannot connect to {}‘.format(filepath))
    return connector(filepath)

def connect_to(filepath):
    factory=None
    try:
        factory=connector_factory(filepath)
    except ValueError as ve:
        print(ve)
    return factory

def main():
    sql_factory=connect_to(os.getcwd()+os.sep+"sqlexample.sql")
    print(sql_factory)
    
    json_factory=connect_to(os.getcwd()+os.sep+"jsonexample.json")
    print(json_factory)
    json_data=json_factory.parsed_data()
    print(‘found: {} donuts‘.format(len(json_data)))
    for donuts in json_data:
        print(‘name: {}‘.format(donuts[‘name‘]))
        print(‘price: ${}‘.format(donuts[‘ppu‘]))
        [print(‘topping: {} {}‘.format(t[‘id‘], t[‘type‘])) for t in donuts[‘topping‘]]
        
    xml_factory=connect_to(os.getcwd()+os.sep+"xmlexample.xml")
    print(xml_factory)
    xml_data = xml_factory.parsed_data()
    liars = xml_data.findall(".//{}[{}=‘{}‘]".format(‘person‘,‘lastName‘, ‘Liar‘))
    print(‘found: {} persons‘.format(len(liars)))
    for liar in liars:
        print(‘first name: {}‘.format(liar.find(‘firstName‘).text))
        print(‘last name: {}‘.format(liar.find(‘lastName‘).text))
        [print(‘phone number ({})‘.format(p.attrib[‘type‘]),p.text) for p in liar.find(‘phoneNumbers‘)]
if __name__=="__main__":
    main()

Cannot connect to C:\Users\sling\Desktop\factory\sqlexample.sql
None
<__main__.jsonconnector object at 0x000000000E4DB9B0>
found: 3 donuts
name: Cake
price: $0.55
topping: 5001 None
topping: 5002 Glazed
topping: 5005 Sugar
topping: 5007 Powdered Sugar
topping: 5006 Chocolate with Sprinkles
topping: 5003 Chocolate
topping: 5004 Maple
name: Raised
price: $0.55
topping: 5001 None
topping: 5002 Glazed
topping: 5005 Sugar
topping: 5003 Chocolate
topping: 5004 Maple
name: Old Fashioned
price: $0.55
topping: 5001 None
topping: 5002 Glazed
topping: 5003 Chocolate
topping: 5004 Maple
<__main__.xmlconnector object at 0x000000000E4DB748>
found: 2 persons
first name: Jimy
last name: Liar
phone number (home) 212 555-1234
first name: Patty
last name: Liar
phone number (home) 212 555-1234
phone number (mobile) 001 452-8819

[
    {
        "id": "0001",
        "type": "donut",
        "name": "Cake",
        "ppu": 0.55,
        "batters": {
            "batter": [
                {
                    "id": "1001",
                    "type": "Regular"
                },
                {
                    "id": "1002",
                    "type": "Chocolate"
                },
                {
                    "id": "1003",
                    "type": "Blueberry"
                },
                {
                    "id": "1004",
                    "type": "Devil‘s Food"
                }
            ]
        },
        "topping": [
            {
                "id": "5001",
                "type": "None"
            },
            {
                "id": "5002",
                "type": "Glazed"
            },
            {
                "id": "5005",
                "type": "Sugar"
            },
            {
                "id": "5007",
                "type": "Powdered Sugar"
            },
            {
                "id": "5006",
                "type": "Chocolate with Sprinkles"
            },
            {
                "id": "5003",
                "type": "Chocolate"
            },
            {
                "id": "5004",
                "type": "Maple"
            }
        ]
    },
    {
        "id": "0002",
        "type": "donut",
        "name": "Raised",
        "ppu": 0.55,
        "batters": {
            "batter": [
                {
                    "id": "1001",
                    "type": "Regular"
                }
            ]
        },
        "topping": [
            {
                "id": "5001",
                "type": "None"
            },
            {
                "id": "5002",
                "type": "Glazed"
            },
            {
                "id": "5005",
                "type": "Sugar"
            },
            {
                "id": "5003",
                "type": "Chocolate"
            },
            {
                "id": "5004",
                "type": "Maple"
            }
        ]
    },
    {
        "id": "0003",
        "type": "donut",
        "name": "Old Fashioned",
        "ppu": 0.55,
        "batters": {
            "batter": [
                {
                    "id": "1001",
                    "type": "Regular"
                },
                {
                    "id": "1002",
                    "type": "Chocolate"
                }
            ]
        },
        "topping": [
            {
                "id": "5001",
                "type": "None"
            },
            {
                "id": "5002",
                "type": "Glazed"
            },
            {
                "id": "5003",
                "type": "Chocolate"
            },
            {
                "id": "5004",
                "type": "Maple"
            }
        ]
    }
]

<persons>
     <person>
       <firstName>John</firstName>
       <lastName>Smith</lastName>
       <age>25</age>
       <address>
         <streetAddress>21 2nd Street</streetAddress>
         <city>New York</city>
         <state>NY</state>
         <postalCode>10021</postalCode>
       </address>
       <phoneNumbers>
         <phoneNumber type="home">212 555-1234</phoneNumber>
         <phoneNumber type="fax">646 555-4567</phoneNumber>
       </phoneNumbers>
       <gender>
         <type>male</type>
       </gender>
     </person>
     <person>
       <firstName>Jimy</firstName>
       <lastName>Liar</lastName>
    <age>19</age>
    <address>
      <streetAddress>18 2nd Street</streetAddress>
      <city>New York</city>
      <state>NY</state>
      <postalCode>10021</postalCode>
    </address>
    <phoneNumbers>
      <phoneNumber type="home">212 555-1234</phoneNumber>
    </phoneNumbers>
    <gender>
      <type>male</type>
    </gender>
  </person>
  <person>
    <firstName>Patty</firstName>
    <lastName>Liar</lastName>
    <age>20</age>
    <address>
      <streetAddress>18 2nd Street</streetAddress>
      <city>New York</city>
      <state>NY</state>
      <postalCode>10021</postalCode>
    </address>
    <phoneNumbers>
      <phoneNumber type="home">212 555-1234</phoneNumber>
      <phoneNumber type="mobile">001 452-8819</phoneNumber>
    </phoneNumbers>
    <gender>
      <type>female</type>
    </gender>
  </person>
</persons>