PyFoodVatTip, Python 3

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#python 3.6.9

#PyFoodVatTip: example of SOLID and generator function
#this code is created by Rezaul Hoque on April 27,2022.
#contact:jewelmrh@yahoo.com;Dhaka,Bangladesh;https://rezaulhoque.wordpress.com,https://hoquestake.blogspot.com
#note: codes shared by Rezaul Hoque on rextester are not for sale; they are created and shared to facilitate the algorithm learning process; many like Hoque use this platform to practice programming ;Rezaul hopes his contribution helps others to fine tune their learning;

from abc import ABC
class Food():
    
      def __init__(self,name):
            self.name = name
                   
      @property
      def fname(self):
            return f"{self.name}"
   
class VatCo(ABC):
         def convert(self,vat:float,tip:int,total:int)->float:
                                                   pass
class WithoutVat(VatCo):
         def convert(self,vat2:float,tip2:int,total: int)->float:
                         print(f'{total+tip2}')
                         return total+tip2

class WithVat(VatCo):
         def convert(self,vat:float,tip:int,total: int)->float:
                         print(f'{total+tip+total*vat}')
                         return total+tip+total*vat

class WithVatDeli(VatCo):
         def convert(self,vat:float,tip:int,total: int)->float:
                         print(f'{total+tip+total*vat+150}')
                         return total+tip+total*vat+150
class Transform:
           def  __init__(self,converter:VatCo):
                              self.converter=converter
                              
           def  disp(self):
                     self.converter.convert(vat,tip,total)

class Package(Food):
    
     def __init__(self,name,price,qty):
          super().__init__(name)
          self.price = price
          self.qty=qty

def fprice(self):
            
            return self.price

def fqty(self):
             return self.qty
      
     def fcost(self):
             return self.price*self.qty

class Detail:
       def __init__(self):
                self.thelist= [ ]

def  add(self,pack):
                self.thelist.append(pack)
         #private method
       def __banner(self):
              print("You've ordered:\n")
     
              yield "~"*35
              
              print("name       price(TK)   qty  cost(TK)\n")
              yield "~"*35
       
       def tot(self):
              total=0
              for s in self.thelist:
                        total += s.fcost()
              return total
    
       def  display(self):
                for i in self.thelist:
##important:string objects are not callable like i.fname();they should be called like i.fname
                     print(f"{i.fname}\t{i.fprice()}\t{i.fqty()}\t{i.fcost()}")

def gen():
       print("Example of SOLID and generator function")
       yield '#'*25
       print("April 27,2022")
       yield 'π'*25

if __name__ == '__main__':

m=gen()
       show=next(m)
       print(show)
       show=next(m)
       print(show)

det = Detail()
       w=det._Detail__banner()
       show=next(w)
       print(show)
       show=next(w)
       print(show)
       det.add(Package('Dal Roti',25,1))
       det.add(Package('Parota Korma',120,1))
       det.add(Package('Naan Lotpoti',50,1))
       det.add(Package('Malai Chaï',30,1))
       det.display()
       print("-"*35)
       print("Total  Cost                  ",  det.tot())
       total=det.tot()
       a=WithVat()
       b=WithVatDeli()
       #p=WithoutVat()
       vat=float(input("Enter vat:\n"))
       tip=float(input("Enter tip:\n"))
       #m=WithoutVat(v,t,total)
       
       #t=Transform(a)
       #print("Total (incl VAT & tip ):")
       #e.disp()
       #t.disp()
       #e=Transform(p)
       #print("Total (excl VAT but incl.tip ):")
       #e.disp()
       c=Transform(b)
       print("Total (incl. VAT,tip & delivery charge):")
       c.disp()

[ - ] Show input
Absolute running time: 0.19 sec, cpu time: 0.04 sec, memory peak: 8 Mb, absolute service time: 0,28 sec