Student directory with dictionaries

student_directory.py

# Create a student directory by allowing the user to enter all data.
def create_student_directory():
    all_students_by_onyen = {}
    all_students_by_email = {}
    all_students_by_name = {}

    # Get as many students as the user wants to enter,
    # storing each in “students” onyen as key.
    stud_name = input('Enter student name (enter blank line to quit): ')
    while stud_name != '':
        one_student = {'name': stud_name}
        onyen = input('Enter onyen: ')
        one_student['onyen'] = onyen
        email = input('Enter email: ')
        one_student['email'] = email

        # Store this “one student” in the all students dictionary.
        if onyen not in all_students_by_onyen:
            all_students_by_onyen[onyen] = one_student
        else:
            print("Repeat onyen.  Not adding to directory.")

        all_students_by_email[email] = one_student
        if stud_name in all_students_by_name:
            # Watch out
            all_students_by_name[stud_name].append(one_student)
        else:
            all_students_by_name[stud_name] = [one_student]

        # Prep for next iteration
        stud_name = input('Enter student name (enter blank line to quit): ')

    return all_students_by_onyen, all_students_by_email, all_students_by_name


# Create a student directory and test it by looking up a value.
def main():
    directory = create_student_directory()

    # Look for a student with onyen of ‘gotz’
    if 'gotz' in directory:
        print(directory['gotz']['name'])


main()