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

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





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Binary file update using Python program

#Create a binary file with roll number, name and marks. Input a roll number and update the marks. import pickle def write():     stud=[]     f=open("test.dat","wb")     ans='y'     while ans.lower()=='y':         rollno=int(input("Enter Roll No:"))         name=input("Enter Name:")         marks=int(input("Enter Marks:"))         stud.append([rollno,name,marks])         ans=input("Add more records?(y)")     pickle.dump(stud,f)     f.close() def update():     found=False     f = open("test.dat","rb+")     n=int(input("enter roll number:"))     try:         while True:             rpos=f.tell()             stu=pickle.load(f)             if stu[0][0]==n:         ...
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