main.py

data = []
students = ""
courses = ""


def loadFile():
    global students
    global courses
    print()
#    name = input("Enter the name of the file to be loaded:").lower()
    name = 'data.csv' #remove me
    with open(name) as file:
      [file loading stuff here]

    print("The following data was loaded:")
    for row in data:
        print(row)
        students += row.get('name')
        courses += row.get('course')

#########

    elif menuInput == 'x':
        studentName = input("Enter a student's name").lower()
        courseName = input("Enter a students's course").lower()

        if studentName not in students.lower():
            print("Student not found")
            menu()
        if courseName not in courses.lower():
            print("Course not found")
            menu()

        for row in data:
            if studentName in row.get("name").lower() and courseName in row.get("course").lower():
                marks = int(row.get("ass1")) + int(row.get("ass2")) + int(row.get("ass3")) + \
                        int(row.get("ass4")) + int(row.get("exam"))
                print("The sum of this student's marks is:", marks)
                menu()
                
        print("Student not enrolled in that course")
        menu()

    else:
        print("Input not recognized, please try again")
        menu()

menu()