media.py

import webbrowser

class Movie():
    """This class provides a structure to organize and display information about movies"""
    valid_ratings = ["G", "PG", "PG-13", "R"]
    #constructor
    def __init__(self, movie_title, movie_storyline, poster_image, trailer_youtube): #underscores means it's a special function, 'self' is the new object/instance being created
        self.title = movie_title
        self.storyline = movie_storyline
        self.poster_image_url = poster_image
        self.trailer_youtube_url = trailer_youtube

    #new method/function
    def show_trailer(self):
        webbrowser.open(self.trailer_youtube_url)