first assignment of python

python/calculator.py

+def add(x, y): return x + y
+def subtract(x, y): return x - y
+def multiply(x, y): return x * y
+def divide(x, y): return x / y if y != 0 else "Error: Divide by zero"
+
+print("Select operation: +, -, *, /")
+operation = input("Operation: ")
+
+num1 = float(input("Enter first number: "))
+num2 = float(input("Enter second number: "))
+
+if operation == '+':
+    print("Result:", add(num1, num2))
+elif operation == '-':
+    print("Result:", subtract(num1, num2))
+elif operation == '*':
+    print("Result:", multiply(num1, num2))
+elif operation == '/':
+    print("Result:", divide(num1, num2))
+else:
+    print("Invalid operation")

python/file_parser.py

+filename = input("Enter file name: ")
+
+try:
+    with open(filename, 'r') as f:
+        lines = f.readlines()
+        for i, line in enumerate(lines, 1):
+            print(f"{i}: {line.strip()}")
+except FileNotFoundError:
+    print("File not found.")

python/student_management_system.py

+class Student:
+    def __init__(self, student_id, name, age, gender, grade, email):
+        self.student_id = student_id
+        self.name = name
+        self.age = age
+        self.gender = gender
+        self.grade = grade
+        self.email = email
+
+    def display(self):
+        print(f"ID: {self.student_id}, Name: {self.name}, Age: {self.age}, Gender: {self.gender}, Grade: {self.grade}, Email: {self.email}")
+
+class StudentManager:
+    def __init__(self):
+        self.students = []
+
+    def add_student(self):
+        print("\n--- Add Student ---")
+        student_id = input("Enter ID: ")
+        name = input("Enter Name: ")
+        age = input("Enter Age: ")
+        gender = input("Enter Gender: ")
+        grade = input("Enter Grade: ")
+        email = input("Enter Email: ")
+
+        student = Student(student_id, name, age, gender, grade, email)
+        self.students.append(student)
+        print("✅ Student added successfully!\n")
+
+    def view_students(self):
+        print("\n--- Student List ---")
+        if not self.students:
+            print("No students available.\n")
+        else:
+            for student in self.students:
+                student.display()
+
+    def update_student(self):
+        print("\n--- Update Student ---")
+        student_id = input("Enter ID of student to update: ")
+        for student in self.students:
+            if student.student_id == student_id:
+                student.name = input("Enter new Name: ")
+                student.age = input("Enter new Age: ")
+                student.gender = input("Enter new Gender: ")
+                student.grade = input("Enter new Grade: ")
+                student.email = input("Enter new Email: ")
+                print("✅ Student updated successfully!\n")
+                return
+        print("❌ Student not found.\n")
+
+    def delete_student(self):
+        print("\n--- Delete Student ---")
+        student_id = input("Enter ID of student to delete: ")
+        for student in self.students:
+            if student.student_id == student_id:
+                self.students.remove(student)
+                print("✅ Student deleted successfully!\n")
+                return
+        print("❌ Student not found.\n")
+
+def main():
+    manager = StudentManager()
+
+    while True:
+        print("\n🎓 Student Management System")
+        print("1. Add Student")
+        print("2. View Students")
+        print("3. Update Student")
+        print("4. Delete Student")
+        print("5. Exit")
+
+        choice = input("Enter your choice (1-5): ")
+
+        if choice == '1':
+            manager.add_student()
+        elif choice == '2':
+            manager.view_students()
+        elif choice == '3':
+            manager.update_student()
+        elif choice == '4':
+            manager.delete_student()
+        elif choice == '5':
+            print("👋 Exiting. Goodbye!")
+            break
+        else:
+            print("⚠️ Invalid choice. Please try again.")
+
+if __name__ == "__main__":
+    main()