Question

A binary file “Bakery.dat” has structure [ItemNo,NamePdt,Quantity,Price].

i. Write a user defined function CreatePdt() to input data for a record and add to Bakery.dat .

ii. Write a function CountItem(ItemNo) in Python which accepts the Item Number as parameter and count and

return number of items by the given ItemNo are stored in the binary file “Bakery.dat”​

Answer 1

Answer:

1)

def File():

   import pickle as p

   with open("Bakery.dat","wb") as r:

       x=int(input("How many values you want to input="))

       y=[]

       for i in range(x):

           yy=[]

           w=int(input("Enter ItemNo="))

           ww=input("Enter NamePdt=")

           www=input("Enter Quantity=")

           wwww=int(input("Enter Price="))

           yy.append(w)

           yy.append(ww)

           yy.append(www)

           yy.append(wwww)

           y.append(yy)

           print()

       p.dump(y,r)

       

File()

2)

def CountItem(ItemNo):

   import pickle as p

   with open("Bakery.dat","rb") as r:

       y=p.load(r)

       print(y)

       c=0

       for i in y:

           if i[0]==ItemNo:

               c=c+1

       print("Nimber of students with stream ",Stream,"are",c)

       

   

x=input("Enter item number to search=")

CountItem(x)

           

   

       

 

Explanation: