1.student.mark.py

students_list = []
courses_list = []
marks_list = []

# Input a number of students in an class (done)
def input_student(students_list):
    # Ask the user how many students would they like to add
    while True:
        try:
            no_students = int(input("Input number of students to be added in the class: "))
            if no_students <= 0:
                print("There must be at least one student")
            else:
                break
        except:
            print("Must be an integer!")

    # Inputting neccessary info for students
    for s in range(0, no_students, 1):
        while True:
            try:
                student_dict = {}
                print(f"---Student {s}. ")
                student_id = int(input("Student ID: "))
                student_name = str(input("Name: "))
                student_dob = str(input("D.O.B (DD/MM/YYYY): "))

                if student_id <= 0 or student_name == "" or student_dob == "":
                    print("try again")
                else:
                    # Check if the student exist yet
                    for student in students_list:
                        name = student.get("name")
                        _id = student.get("id")
                        if student_name == name or student_id == _id:
                            print("Student already exist!")
                            return

                    student_dict.update({"id":student_id})
                    student_dict.update({"name":student_name})
                    student_dict.update({"dob":student_dob})

                    students_list.append(student_dict)
                    break
            except:
                print("Something went wrong, try again.")

# List out all students in the class (Done)
def list_student(students_list):
    print("---List of students in the class---")
    counter = 1
    for student_dict in students_list:
        # Only print out the student's info if all keys exists
        if "name" and "id" and "dob" in student_dict:
            student_name = student_dict.get("name")
            student_id = student_dict.get("id")
            student_dob = student_dict.get("dob")

            print(f"Student {counter}. Name: {student_name}, ID: {student_id}, D.O.B: {student_dob}")
            counter = counter + 1

# Input a number of courses (Done)
def input_course(course_list):
    # Ask the user how many courses they would like to add
    while True:
        try:
            no_courses = int(input("Input number of courses to be added: "))
            if no_courses <= 0:
                print("There must be at least one course")
            else:
                break
        except:
            print("Must be an integer!")

    # Inputting neccessary info for the courses
    for c in range(0, no_courses, 1):
        while True:
            try:
                print(f"---Course {c}. ")
                
                course_dict = {}
                course_name = str(input("Course Name: "))
                course_id = int(input("Course ID: "))

                if course_id <= 0 or course_name == "":
                    print("try again")
                else:
                    # Check if the course exist yet
                    for course in course_list:
                        name = course.get("name")
                        _id = course.get("id")
                        if course_name == name or course_id == _id:
                            print("Course already exist!")
                            return

                    course_dict.update({"name":course_name})
                    course_dict.update({"id":course_id})

                    course_list.append(course_dict)
                    break
            except:
                print("Something went wrong, try again.")

# List out available courses (Done)
def list_course(courses_list):
    counter = 1
    print("---List of courses available---")
    for course_dict in courses_list:
        if "name" and "id" in course_dict:
            course_name = course_dict.get("name")
            course_id = course_dict.get("id")

            print(f"Course {counter}. Name: {course_name}, ID: {course_id}")
            counter = counter + 1

# Select a course, input marks for a student in that courses
def input_mark(students_list, courses_list, marks_list):
    student_exist = False
    course_exist = False

    student_name = input("Student's name: ")
    # Check if the student exist 
    if len(students_list) == 0:
        print("Student does not exist!")
        return
    else:
        for student_dict in students_list:
            name = student_dict.get("name")
            if student_name == name:
                student_exist = True
    
    course_name = input("Course's name: ")
    # Check if the course exist
    if len(courses_list) == 0:
        print("Course does not exist!")
        return
    else:
        for course_dict in courses_list:
            name = course_dict.get("name")
            if course_name == name:
                course_exist = True
    
    # If student or course does not exist, then the function stops
    if student_exist == False:
        print("Student does not exist!")
        return
    if course_exist == False:
        print("Course does not exist!")
        return
        
    # Ask the user the student's mark for that course
    student_mark = 0
    while True:
        try:
            student_mark = float(input("Input mark here: "))
            if student_mark < 0:
                print("Mark must be non-negative")
            else:
                break
        except:
            print("Must be a number!")
    
    # The student mark will be a dictionary
    student_mark_dict = {}
    student_mark_dict.update({"student_name":student_name})
    student_mark_dict.update({"course_name":course_name})
    student_mark_dict.update({"student_mark":student_mark})

    # Add the mark's info into the list
    marks_list.append(student_mark_dict)

# List out all mark of a student
def list_mark(marks_list):
    search_target = input("Whose mark do you want to see?: ")

    for mark_dict in marks_list:
        if "student_name" and "course_name" and "student_mark" in mark_dict:
            student_name = mark_dict.get("student_name")
            course_name = mark_dict.get("course_name")
            student_mark = mark_dict.get("student_mark")

            # Display the mark of a specific student
            if search_target == student_name:
                print(f"Student: {student_name}, Course: {course_name}, Mark: {student_mark}")

# Execute the code
# This code will loop until terminated
if __name__ == "__main__":
    print("------Student Mark management system------")

    while True:
        print("---Here are the things that you could do---")
        print("1. Add new student(s)")
        print("2. Add new course(s)")
        print("3. Select a course and input mark for student")
        print("4. List out all students")
        print("5. List out all courses")
        print("6. List out all students' mark for each courses")
        print("7. Exit")
        
        op = input("What do you want to do? (1-7): ")

        # Use this code if you're using a Python version 3.10 or later
        match op:
            case "1":
                input_student(students_list)
            case "2":
                input_course(courses_list)
            case "3":
                input_mark(students_list, courses_list, marks_list)
            case "4":
                list_student(students_list)
            case "5":
                list_course(courses_list)
            case "6":
                list_mark(marks_list)
            case "7":
                exit()
            case _:
                print("Invalid input")
        
        # Use this code if you're using a Python version earlier than 3.10
        # if op == "1":
        #     input_student(students_list)
        # elif op == "2":
        #     input_course(courses_list)
        # elif op == "3":
        #     input_mark(students_list, courses_list, marks_list)
        # elif op == "4":
        #     list_student(students_list)
        # elif op == "5":
        #     list_course(courses_list)
        # elif op == "6":
        #     list_mark(marks_list)
        # elif op == "7":
        #     exit()
        # else:
        #     print("Invalid input")
        print("\n")