Student Menu in Python

"""
A program that would accept a set dictionary data
student: dict={
    'idno':<inputted data>
    'name':<inputted data>
    'course':<inputted data>
    'level':<inputted data>
}
and put it in a list, create a menu that would
facilitate the operators on the options provided
Details below:
------Main Menu------
1. Add Student
2. Find Student using idno
3. Delete Student using idno
4. Display all
0. Quit/End
---------------------
Enter Option(0..4):
"""
from os import system

student_list: list = []

def getdata() -> dict:
    system("cls")
    student: dict = {}  # empty dictionary, not an empty set
    try:
        idno: int = int(input("Enter id number: "))
        student['idnum'] = idno
    except Exception:
        print("Invalid Age")
        student.setdefault('idnum', 0)
    studentname: str = input("Enter student name: ")
    course: str = input("Enter course: ")
    level: str = input("Enter level: ")

    student['studentname'] = studentname
    student['course'] = course
    student['level'] = level

    return student

def addstudent() -> None:
    global student_list
    stud: dict = getdata()
    student_list.append(stud)

def findstudent() -> None:
    idno: int = int(input("Enter id number: "))
    if len(student_list) > 0:
        for student in student_list:
            if student['idnum'] == idno:
                print(student['idnum'], end=' ')
                print(student['studentname'], end=' ')
                print(student['course'], end=' ')
                print(student['level'], end=' ')
                print("")
                break
    else:
        print("List is Empty")
    input("Press any key to continue...")

def deletestudent() -> None:
    print("----Delete a student from the list----")
    idno: int = int(input("Enter id number: "))
    if len(student_list) > 0:
        for student in student_list:
            if student['idnum'] == idno:
                student_list.remove(student)
                break
    else:
        print('Student did not exist!')
    input("Press any key to continue...")


def displayall() -> None:
    if len(student_list) > 0:
        for student in student_list:
            print(f"{student['idnum']} {student['studentname']} {student['course']} {student['level']}")
    else:
        print("List is empty !")

    input("Press any key to continue")

def terminate() -> None:
    print("Program Ends...")

def menuselect(option: int) -> None:
    mymenu = {
        1: addstudent,
        2: findstudent,
        3: deletestudent,
        4: displayall,
        0: terminate
    }
    func = mymenu.get(option)
    return func()


def menu() -> None:
    system("cls")
    menuitems = (
        '-----Main Menu----',
        '1. Add Student',
        '2. Find Student using idno',
        '3. Delete Student using idno',
        '4. Display All',
        '0. Quit/End ',
        '------------------'
    )
    [print(menuitem) for menuitem in menuitems]

def main() -> None:
    opt: int = -1
    while opt != 0:
        menu()
        opt = int(input("Enter Option (0..4):"))
        menuselect(opt)

if __name__ == "__main__":
    main()