2.2_zad.py

class Student:
    def __init__(self, student_id, fname, lname, age, gpa, major):
        self.student_id = student_id
        self.fname = fname
        self.lname = lname
        self.age = age
        self.gpa = gpa
        self.major = major

    def display_info(self):
        print(f"Фак.номер: {self.student_id}")
        print(f"Име: {self.fname}")
        print(f"Фамилия: {self.lname}")
        print(f"Възраст: {self.age}")
        print(f"Успех: {self.gpa}")
        print(f"Специалност: {self.major}")

    def avg_gpa(self, grades):
        if not grades:
            return 0.0

        total = sum(grades)
        avg_gpa = total / len(grades)
        return avg_gpa

def sort_by_age(student_list):
    sorted_students = sorted(student_list, key=lambda x: x.age)
    for student in sorted_students:
        student.display_info()

def search_by_name(student_list, fname, lname):
    found = False
    for student in student_list:
        if student.fname == fname and student.lname == lname:
            found = True
            student.display_info()
            break
    if not found:
        print("Not found!!!")

def avg_by_name(student_list, fname, lname):
    found = False

    for student in student_list:
        if student.fname == fname and student.lname == lname:
            found = True
            avg_gpa = student.avg_gpa(student.gpa)
            print(f"Average gpa of {fname} {lname}: {avg_gpa}")
            break

    if not found:
        print("Not found!!!")

def filter_by_major(student_list):
    major_students = sorted(student_list, key=lambda student: student.major)
    for student in major_students:
        student.display_info()

def remove_student(student_list, student_id):
    for student in student_list:
        if student.student_id == student_id:
            student_list.remove(student)
            print(f"Student deleted!")
            break
    else:
        print("Wrong student id!")

n = int(input("Брой студенти: "))
student_list = []

for _ in range(n):
    student_id = int(input())
    fname = input()
    lname = input()
    age = int(input())
    gpa = float(input())
    major = input()

    student = Student(student_id, fname, lname, age, gpa, major)
    student_list.append(student)

while True:

    print("1. Сортиране по възраст")
    print("2. Търсене на студент по име и фамилия")
    print("3. Изчисляване на средния успех на студент по име и фамилия")
    print("4. Филтриране на студентите по специалност и извеждане на информация за тези студенти")
    print("5. Премахване на студент от списъка по идентификационен номер")
    print("6. Изход")

    choice = int(input())

    match choice:
        case 1:
            sort_by_age(student_list)
        case 2:
            fname = input()
            lname = input()
            search_by_name(student_list, fname, lname)
        case 3:
            fname = input()
            lname = input()
            avg_by_name(student_list, fname, lname)
        case 4:
            filter_by_major(student_list)
        case 5:
            student_id = int(input())
            remove_student(student_list, student_id)
            print(student_list)
        case 6:
            break
        case _:
            print("Wrong option!")