bill_code

def bill_top(self):
        invoice=int(time.strftime("%H%M%S"))+int(time.strftime("%d%m%Y"))
        bill_top_temp=f'''
\t\tXYZ-Inventory
\t Phone No. 98725***** , Delhi-125001
{str("="*47)}
 Customer Name: {self.var_cname.get()}
 Ph no. :{self.var_contact.get()}
 Bill No. {str(invoice)}\t\t\tDate: {str(time.strftime("%d/%m/%Y"))}
{str("="*47)}
 Product Name\t\t\tQTY\tPrice
{str("="*47)}
        '''
        self.txt_bill_area.delete('1.0',END)
        self.txt_bill_area.insert('1.0',bill_top_temp)

    def bill_bottom(self):
        bill_bottom_temp=f'''
{str("="*47)}
 Bill Amount\t\t\t\tRs.{self.bill_amnt}
 Discount\t\t\t\tRs.{self.discount}
 Net Pay\t\t\t\tRs.{self.net_pay}
{str("="*47)}\n
        '''
        self.txt_bill_area.insert(END,bill_bottom_temp)
        
    def bill_middle(self):
        for row in self.cart_list:
        pid,name,price,qty,stock
            name=row[1]
            qty=row[3]
            price=float(row[2])*int(row[3])
            price=str(price)
            self.txt_bill_area.insert(END,"\n "+name+"\t\t\t"+qty+"\tRs."+price)