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The document is a Python script for managing student records using pickle for data serialization. It includes functions to load, save, add, search, and display student records based on roll numbers. A menu-driven interface allows users to interact with the system to perform these operations.

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nitikapradhan077
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5 views2 pages

P 5

The document is a Python script for managing student records using pickle for data serialization. It includes functions to load, save, add, search, and display student records based on roll numbers. A menu-driven interface allows users to interact with the system to perform these operations.

Uploaded by

nitikapradhan077
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as TXT, PDF, TXT or read online on Scribd
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import pickle

import os

filename = "students.dat"

def load_records():
if os.path.exists(filename):
with open(filename, "rb") as file:
return pickle.load(file)
else:
return []

def save_records(records):
with open(filename, "wb") as file:
pickle.dump(records, file)

def add_record():
records = load_records()
rollno = input("Enter roll number: ")
# Check if rollno already exists
for rec in records:
if rec['rollno'] == rollno:
print("Record with this roll number already exists!")
return
name = input("Enter name: ")
try:
marks = float(input("Enter marks: "))
except ValueError:
print("Invalid marks. Must be a number.")
return
record = {'rollno': rollno, 'name': name, 'marks': marks}
records.append(record)
save_records(records)
print("Record added successfully.")

def search_record():
records = load_records()
rollno = input("Enter roll number to search: ")
for rec in records:
if rec['rollno'] == rollno:
print(f"Record Found: Roll No: {rec['rollno']}, Name: {rec['name']},
Marks: {rec['marks']}")
return
print("Record not found.")

def display_all():
records = load_records()
if not records:
print("No records found.")
return
print("All Student Records:")
for rec in records:
print(f"Roll No: {rec['rollno']}, Name: {rec['name']}, Marks:
{rec['marks']}")

def menu():
while True:
print("\n--- Student Records Menu ---")
print("1. Add new record")
print("2. Search student by roll number")
print("3. Display all records")
print("4. Exit")
choice = input("Enter your choice (1-4): ")

if choice == '1':
add_record()
elif choice == '2':
search_record()
elif choice == '3':
display_all()
elif choice == '4':
print("Exiting...")
break
else:
print("Invalid choice. Please try again.")

menu()

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