Question

Create a binary file with name and roll number. Search for a given roll number and display the name, if not found display an appropriate message.​

Answer 1

Explanation:

On inputting a roll number it should update the marks But my code is not working as expected can anybody help me with this l=len(bsk) loc=data.find(bsk) if loc<0: print('Details not present') else.

Answer 2

Answer:

import pickle

def insert(name,roll_no):

   with open("reco.dat","ab") as file:

       dic = {"Name":name, "Roll no.":roll_no}

       pickle.dump(dic,file)

       print("Saved!")

def Search(roll_no):

   f = open("reco.dat","rb")

   while True:

       text = pickle.load(f)

       try:

           if text["Roll no."] == roll_no:

               print("Search result:")

               print("Roll no: ",text['Roll no.'])

               print("Name: ",text['Name'])

               break

       except EOFError:

           print("Roll no. not found!")

           break

           

while True:

   print("""\nMENU:

Press 1 to insert data.

Press 2 to search data.

Press 3 to quit.""")

   inp = int(input())

   if inp == 1:

       while True:

           name = input("\nEnter Name(type '!b' to go to menu): ")

           if name == "!B" or name == "!b":

               break

           else:

               roll_no = int(input("Enter Roll No.: "))

               insert(name,roll_no)

   elif inp == 2:

       while True:

           roll_no = input("\nEnter Roll(type '!b' to go to menu): ")

           if roll_no == "!b" or roll_no == "!B":

               break

           else:

               roll_no = int(roll_no)

               Search(roll_no)

   elif inp == 3:

       break

   else:

       print("Invaild input\n")

Explanation:

Just two easy functions. One to insert and another to search.

that's it.