Docstrings can be accessed through the __doc__ attribute, which is set to None by default.
Verify it by printing movie1.__doc__ and series1.__doc__. Note that the __doc__ attribute is not inherited by any child class.
CODE:
class Movie:
"""Parent class representing a movie."""
def \__init_\_(self, title, year, director, duration):
if not title.strip():
raise ValueError('Title cannot be empty')
if year < 1895:
raise ValueError('Year must be 1895 or later')
if not director.strip():
raise ValueError('Director cannot be empty')
if duration <= 0:
raise ValueError('Duration must be positive')
self.title = title
self.year = year
self.director = director
self.duration = duration
def \__str_\_(self):
return f'{self.title} ({self.year}) - {self.duration} min, {self.director}'
class TVSeries(Movie):
def \__init_\_(self, title, year, director, duration, seasons, total_episodes):
super().\__init_\_(title, year, director, duration)
if seasons < 1:
raise ValueError('Seasons must be 1 or greater')
if total_episodes < 1:
raise ValueError('Total episodes must be 1 or greater')
self.seasons = seasons
self.total_episodes = total_episodes
def \__str_\_(self):
return f'{self.title} ({self.year}) - {self.seasons} seasons, {self.total_episodes} episodes, {self.duration} min avg, {self.director}'
class MediaCatalogue:
def \__init_\_(self):
self.items = \[\]
def add(self, media_item):
self.items.append(media_item)
def \__str_\_(self):
if not self.items:
return 'Media Catalogue (empty)'
result = f'Media Catalogue ({len(self.items)} items):\\n\\n'
for i, movie in enumerate(self.items, 1):
result += f'{i}. {movie}\\n'
return result
catalogue = MediaCatalogue()
try:
movie1 = Movie('The Matrix', 1999, 'The Wachowskis', 136)
catalogue.add(movie1)
movie2 = Movie('Inception', 2010, 'Christopher Nolan', 148)
catalogue.add(movie2)
series1 = TVSeries('Scrubs', 2001, 'Bill Lawrence', 24, 9, 182)
catalogue.add(series1)
series2 = TVSeries('Breaking Bad', 2008, 'Vince Gilligan', 47, 5, 62)
catalogue.add(series2)
print(catalogue)
except ValueError as e:
print(f'Validation Error: {e}')
