python homework

Courses.py

def createDictionaries(): rooms = {"CS101":3004, "CS102":4501, "CS103":6755, "NT110":1244, "CM241": 1411} instructors = {"CS101":"Haynes", "CS102":"Alvarado", "CS103": "Rich", "NT110":"Burke", "CM241": "Lee"} times = {"CS101":"8:00 a.m.", "CS102":"9:00 a.m.", "CS103":"10:00 a.m.", "NT110":"11:00 a.m.", "CM241": "1:00 p.m."} return rooms, instructors, times def menu(): print("Course Information") print("1. Display information for a course") print("2. Add a new course") print("3. Delete a course") print("4. Change course information") print("5. Quit") selection = input("Enter your choice: ") print() return selection def courseInfo(rooms, instructors, times): course = input("Enter a course number: ") if course not in rooms: print(course, "is an invalid course number.") else: print("The details for course", course, "are:") print("Room:", rooms[course]) print("Instructor:", instructors[course]) print("Time:", times[course]) print() def addCourse(rooms, instructors, times): course = input("What is the new course? ") if course in rooms: print("Cannot add, course already exists.") else: room = int(input("Enter room number: ")) instructor = input("Enter the instructor: ") time = input("Enter the time: ") rooms[course] = room instructors[course] = instructor times[course] = time def deleteCourse(rooms, instructors, times): course = input("Enter the course you want to delete: ") if course in rooms: print("Course Deleted") rooms.pop(course, "Course does not exist") instructors.pop(course, "Course does not exist") times.pop(course, "Course does not exist") def changeInfo(rooms, instructors, times): course = input("Enter course to change: ") change = input("What to change: (R)oom, (I)ntructor, (T)ime ") value = input("Enter new value ") if change == "R": rooms[course] = int(value) elif change == "I": instructors[course] = value else: times[course] = value def main(): rooms, instructors, times = createDictionaries() selection = menu() while selection != "5": if selection == "1": courseInfo(rooms, instructors, times) elif selection == "2": addCourse(rooms, instructors, times) elif selection == "3": deleteCourse(rooms, instructors, times) elif selection == "4": changeInfo(rooms, instructors, times) selection = menu() main()