Saving outputs as record in class & update if same product name given as input python-CodePudding

I've a code like this.

class salesperson:
    
    def __init__(self, name):
        self.name=name
        self.market_price=0
        self.quantity=0
        self.product_name=0
        
        
        #if self.product_name != self.product_name:
            
           
        #self.finalamount=0
        
        
    def buy_pro(self, product_name, market_price, quantity):
        self.product_name = product_name
        self.market_price=market_price
        self.quantity=quantity
        
        self.a= ({self.product_name: [self.market_price, self.quantity]})
    
    def get_value(self):
        
            #self.buyproduct()
            finalamount = self.market_price * -self.quantity
            
        
            return finalamount
      
   
        
    def get_name(self):
        return (self.name)
    
  
    def get_record(self):
        return (self.a)

input:

sp_name=salesperson('name')
sp_name.buy_pro('mobile',30,20)
sp_name.get_value() 
sp_name.get_record()

output:

600
Explanation(30*20 =600)

Know, If I give same input with same item name, Then record should be updated.

    Example:
    sp_name.buy_pro('mobile',10,2)
    sp_name.get_value()
    sp_name.get_record()

Expected output:

620
Explination(As item name is same (600(previous value)   (10*2)20= 620

But output I'm getting.

Can you guys pls suggest what Is the logic I can use that previous value is added to current input if product name is same?

CodePudding user response：

use these codes under def init():

self.last=""
self.finalamount=0

and use this get_value():

def get_value(self):
    if self.last == self.name:
        self.finalamount  = self.market_price * self.quantity
    else:
        self.finalamount = self.market_price * self.quantity
        
    self.last=self.name
    return self.finalamount

or you can create a list of last_names for compare with after names

fullcode:

class salesperson:
    
    def __init__(self, name):
        self.name=name
        self.market_price=0
        self.quantity=0
        self.product_name=0
        
        self.last=""
        self.finalamount=0        
        
    def buy_pro(self, product_name, market_price, quantity):
        self.product_name = product_name
        self.market_price=market_price
        self.quantity=quantity
        
        self.a= ({self.product_name: [self.market_price, self.quantity]})
    
    def get_value(self):
        if self.last == self.name:
            self.finalamount  = self.market_price * self.quantity
        else:
            self.finalamount = self.market_price * self.quantity
            
        self.last=self.name
        return self.finalamount    
        
    def get_name(self):
        return (self.name)

        

sp_name=salesperson('name')

sp_name.buy_pro('mobile',30,20)
print(sp_name.get_value())

sp_name.buy_pro('mobile',10,2)
print(sp_name.get_value())

CodePudding user response：

in method buy_pro the line which states self.quantity=quantity should be self.quantity = quantity This will update the self.quantity value with the current order quatity