Adapted code to support example functionality from class.

main.py

 from sys import stderr
 
 from sqlalchemy.exc import SQLAlchemyError
-from movies import MovieDatabase, Genre
+from movies import MovieDatabase, Movie
 
 from kivy.app import App
 
@@ -14,8 +14,8 @@ class MoviesApp(App):
         self.session = self.movie_database.create_session()
 
     def print_records(self):
-        for genre in self.session.query(Genre):
-            print(genre.name)
+        for movie in self.session.query(Movie):
+            print(f'{movie.title}{" " * (12 - len(movie.title))}(budget ${movie.budget}, gross revenue ${movie.gross_revenue})')
 
 
 def main():

movies_installer.py

@@ -4,53 +4,14 @@ from datetime import date
 
 from sqlalchemy.exc import SQLAlchemyError
 
-from movies import MovieDatabase, Movie, Genre, Review
+from movies import MovieDatabase, Movie
 
 
 def add_starter_data(session):
-    biography = Genre(name='Biography')
-    drama = Genre(name='Drama')
-    history = Genre(name='History')
-    action = Genre(name='Action')
-    adventure = Genre(name='Adventure')
-    sci_fi = Genre(name='SciFi')
-    session.add(biography)
-    session.add(drama)
-    session.add(history)
-    session.add(action)
-    session.add(adventure)
-    session.add(sci_fi)
-
-    # Hidden Figures (Biography, Drama, History)
-    #  2016 October 15
-    #  Budget: $25,000,000
-    #  Gross Revenue: $206,000,000
-    # Sample review from IMDB:
-    #  "★★★★★★★★★☆ In the opinion of this reviewer, an extraordinary achievement."
-    hidden_figures = Movie(title='Hidden Figures', budget=25000000, gross_revenue=206000000,
-                           opening_date=date(2016, 10, 15), genres=[biography, drama, history])
-    session.add(hidden_figures)
-    extraordinary_achievement = Review(movie=hidden_figures, score=9,
-                                       comments='In the opinion of this reviewer, an extraordinary achievement.')
-    session.add(extraordinary_achievement)
-
-    # Avengers: Infinity War (Action, Adventure)
-    #  2018 April 27
-    #  Budget: $300,000,000
-    #  Gross Revenue: $2,048,000,000
-    # Sample reviews from IMDB:
-    #  "★★★★★★★★★★ A summer film that IS even better than the hype."
-    #  "★★★★★★☆☆☆☆ Bordering on a comedy, "Infinity War" is overhyped, lacked direction, but at times impressed."
-    infinity_war = Movie(title='Avengers: Infinity War', budget=300000000, gross_revenue=2048000000,
-                         opening_date=date(2018, 4, 27), genres=[action, adventure])
-    session.add(infinity_war)
-    better_than_hype = Review(movie=infinity_war, score=10,
-                              comments='A summer film that IS even better than the hype.')
-    bordering_on_comedy = Review(movie=infinity_war, score=6,
-                                 comments='Bordering on a comedy, "Infinity War" is overhyped, lacked direction, but '
-                                          'at times impressed.')
-    session.add(better_than_hype)
-    session.add(bordering_on_comedy)
+    session.add(Movie(title='Example I', budget=1000, gross_revenue=2000))
+    session.add(Movie(title='Example II', budget=2000, gross_revenue=2000))
+    session.add(Movie(title='Example III', budget=2000, gross_revenue=1000))
+    session.add(Movie(title='Example IV', budget=1000, gross_revenue=1000))
 
 
 def main():