Enter Student ID: S001 Enter Name: Alice Johnson Enter Age: 20 Enter Grade (0-100): 92 ✓ Student Alice Johnson added successfully!
def add_student(self, student): """Add a new student""" if student.student_id in self.students: print(f"Student with ID student.student_id already exists!") return False self.students[student.student_id] = student print(f"✓ Student student.name added successfully!") return True python in netbeans
def load_from_file(self, filename='students.json'): """Load student data from JSON file""" try: with open(filename, 'r') as f: data = json.load(f) for item in data: student = Student( item['student_id'], item['name'], item['age'], item['grade'] ) self.students[student.student_id] = student print(f"✓ Loaded len(data) students from filename") return True except FileNotFoundError: print(f"No saved data found in filename") return False def display_menu(): """Display the main menu""" print("\n" + "="*50) print(" STUDENT MANAGEMENT SYSTEM") print("="*50) print("1. Add New Student") print("2. Remove Student") print("3. Find Student") print("4. List All Students") print("5. Show Statistics") print("6. Save Data to File") print("7. Load Data from File") print("8. Exit") print("="*50) Enter Student ID: S001 Enter Name: Alice Johnson
# Try to load existing data manager.load_from_file() Remove Student") print("3
class Student: """Student class with basic information"""
def __init__(self, student_id, name, age, grade): self.student_id = student_id self.name = name self.age = age self.grade = grade self.created_at = datetime.now()