Tell us what’s happening:
I thought this last step was the most simple but I must do something wrong. I get the message “You should have result += ‘=== TV SERIES ===\n’ inside your second if statement.”. That is what I am doing, isn’t it?
Your code so far
class MediaError(Exception):
"""Custom exception for media-related errors."""
def __init__(self, message, obj):
super().__init__(message)
self.obj = obj
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):
"""Child class representing an entire TV series."""
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:
"""A catalogue that can store different types of media items."""
def __init__(self):
self.items = []
def add(self, media_item):
if not isinstance(media_item, Movie):
raise MediaError('Only Movie or TVSeries instances can be added', media_item)
self.items.append(media_item)
def get_movies(self):
return [item for item in self.items if type(item) is Movie]
def get_tv_series(self):
return [item for item in self.items if isinstance(item, TVSeries)]
def __str__(self):
if not self.items:
return 'Media Catalogue (empty)'
movies = self.get_movies()
series = self.get_tv_series()
result = f'Media Catalogue ({len(self.items)} items):\n\n'
# User Editable Region
if movies:
result += '=== MOVIES ===\n'
for i, movie in enumerate(movies, 1):
result += f'{i}. {movie}\n'
if series:
result += '=== SERIES ===\n'
for i, series in enumerate(series, 1):
result += f'{i}. {series}\n'
# User Editable Region
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}')
except MediaError as e:
print(f'Media Error: {e}')
print(f'Unable to add {e.obj}: {type(e.obj)}')
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Challenge Information:
Build a Media Catalogue - Step 42