368 lines
12 KiB
Python
368 lines
12 KiB
Python
# HW3 - Task 1
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# Nicholas Pease
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# IMDB Data Loading into MongoDB
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import csv
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import pandas as pd
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from pymongo import MongoClient, ASCENDING
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from pymongo.errors import ConnectionFailure, DuplicateKeyError
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import os
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from typing import Dict, List, Optional
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from collections import defaultdict
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# Global data structures for processing
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movies = {}
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persons = {}
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directors = {}
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client = None
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db = None
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movies_collection = None
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def connect(connection_string: str = "mongodb://localhost:27017/",
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database_name: str = "imdb_database") -> bool:
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global client, db, movies_collection
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try:
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client = MongoClient(connection_string, serverSelectionTimeoutMS=5000)
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client.admin.command('ping')
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db = client[database_name]
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movies_collection = db.movies
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print(f"Connected to MongoDB database: {database_name}")
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return True
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except ConnectionFailure as e:
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print(f"Failed to connect to MongoDB: {e}")
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return False
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except Exception as e:
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print(f"MongoDB connection error: {e}")
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return False
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def disconnect():
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global client
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if client:
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client.close()
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def load_movies_data(file_path: str, sample_size: Optional[int] = None) -> bool:
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global movies
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try:
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movies_loaded = 0
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with open(file_path, 'r', encoding='latin-1') as file:
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next(file)
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for line in file:
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if sample_size and movies_loaded >= sample_size:
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break
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line = line.strip()
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if not line:
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continue
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try:
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parts = line.split(',')
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movie_id = int(parts[0])
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year_str = parts[-2] if len(parts) >= 3 else ''
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rank_str = parts[-1] if len(parts) >= 4 else ''
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movie_name = ','.join(parts[1:-2]) if len(parts) > 3 else parts[1] if len(parts) > 1 else ''
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year = int(year_str) if year_str and year_str.strip() else None
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rank = float(rank_str) if rank_str and rank_str.strip() else None
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movies[movie_id] = {
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'movie_id': movie_id,
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'movie_name': movie_name,
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'year': year,
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'rank': rank,
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'directors': [],
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'cast': []
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}
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movies_loaded += 1
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except (ValueError, IndexError):
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continue
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print(f"Loaded {len(movies)} movies")
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return True
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except Exception as e:
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print(f"Error loading movies: {e}")
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return False
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def load_persons_data(file_path: str) -> bool:
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global persons
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try:
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persons_df = pd.read_csv(
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file_path,
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encoding='latin-1',
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dtype={
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'id': 'int32',
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'fname': 'string',
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'lname': 'string',
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'gender': 'string'
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}
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)
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for _, row in persons_df.iterrows():
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person_id = int(row['id'])
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full_name = f"{row['fname']} {row['lname']}".strip()
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persons[person_id] = {
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'person_id': person_id,
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'name': full_name,
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'gender': str(row['gender'])
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}
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print(f"Loaded {len(persons)} persons")
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return True
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except Exception as e:
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print(f"Error loading persons: {e}")
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return False
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def load_directors_data(file_path: str) -> bool:
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global directors
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try:
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directors_df = pd.read_csv(
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file_path,
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encoding="latin-1",
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dtype={
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'id': 'int32',
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'fname': 'string',
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'lname': 'string'
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}
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)
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for _, row in directors_df.iterrows():
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director_id = int(row['id'])
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full_name = f"{row['fname']} {row['lname']}".strip()
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directors[director_id] = {
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'director_id': director_id,
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'name': full_name
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}
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print(f"Loaded {len(directors)} directors")
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return True
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except Exception as e:
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print(f"Error loading directors: {e}")
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return False
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def load_movie_directors_data(file_path: str) -> bool:
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global movies, directors
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try:
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movie_directors_df = pd.read_csv(
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file_path,
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encoding='latin-1',
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dtype={'did': 'int32', 'mid': 'int32'}
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)
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linked_count = 0
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for _, row in movie_directors_df.iterrows():
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director_id = int(row['did'])
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movie_id = int(row['mid'])
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if movie_id in movies and director_id in directors:
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director_info = {
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'director_id': director_id,
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'name': directors[director_id]['name']
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}
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movies[movie_id]['directors'].append(director_info)
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linked_count += 1
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return True
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except Exception as e:
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print(f"Error loading movie-director relationships: {e}")
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return False
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def load_cast_data(file_path: str, max_cast_per_movie: int = 25) -> bool:
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global movies, persons
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try:
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if not os.path.exists(file_path):
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return True
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movie_cast_count = defaultdict(int)
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linked_count = 0
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with open(file_path, 'r', encoding='latin-1') as file:
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next(file)
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for line_num, line in enumerate(file):
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if line_num > 100000:
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break
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line = line.strip()
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if not line:
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continue
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try:
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parts = line.split(',')
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if len(parts) < 3:
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continue
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person_id = int(parts[0])
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movie_id = int(parts[1])
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role = ','.join(parts[2:]) if len(parts) > 2 else "[Unknown]"
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if (movie_id in movies and person_id in persons and
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movie_cast_count[movie_id] < max_cast_per_movie):
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cast_info = {
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'person_id': person_id,
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'name': persons[person_id]['name'],
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'gender': persons[person_id]['gender'],
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'role': role
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}
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movies[movie_id]['cast'].append(cast_info)
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movie_cast_count[movie_id] += 1
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linked_count += 1
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except (ValueError, KeyError):
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continue
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if linked_count > 0:
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print(f"Loaded {linked_count} cast entries")
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return True
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except Exception as e:
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return True
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def create_indexes():
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global movies_collection
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try:
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movies_collection.create_index("movie_name", unique=True, name="idx_movie_name")
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movies_collection.create_index("year", name="idx_year")
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movies_collection.create_index("rank", name="idx_rank")
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movies_collection.create_index("directors.name", name="idx_director_name")
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except Exception as e:
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pass
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def insert_movies_to_mongodb(batch_size: int = 2000) -> bool:
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global movies, movies_collection
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try:
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movies_collection.drop()
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documents = []
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for movie_id, movie_data in movies.items():
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document = {
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'movie_id': movie_data['movie_id'],
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'movie_name': movie_data['movie_name'],
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'year': movie_data['year'],
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'rank': movie_data['rank'],
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'directors': movie_data['directors'],
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'cast': movie_data['cast']
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}
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documents.append(document)
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if len(documents) >= batch_size:
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movies_collection.insert_many(documents, ordered=False)
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documents = []
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if documents:
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movies_collection.insert_many(documents, ordered=False)
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create_indexes()
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total_count = movies_collection.count_documents({})
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print(f"Inserted {total_count} movies into MongoDB")
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return True
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except Exception as e:
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print(f"Error inserting data into MongoDB: {e}")
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return False
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def query_movie_by_name(movie_name: str) -> Optional[Dict]:
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global movies_collection
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try:
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result = movies_collection.find_one({"movie_name": movie_name})
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return result
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except Exception as e:
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print(f"Error querying movie by name: {e}")
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return None
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def query_movies_by_year_range(start_year: int, end_year: int) -> List[Dict]:
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global movies_collection
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try:
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query = {"year": {"$gte": start_year, "$lte": end_year}}
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results = movies_collection.find(query).sort("year", 1)
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return list(results)
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except Exception as e:
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print(f"Error querying movies by year range: {e}")
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return []
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def main():
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try:
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print("IMDB DATA LOADING FOR MONGODB")
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print("=" * 50)
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data_directory = "IMDB"
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sample_size = None
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movie_file = os.path.join(data_directory, "IMDBMovie.txt")
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person_file = os.path.join(data_directory, "IMDBPerson.txt")
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director_file = os.path.join(data_directory, "IMDBDirectors.txt")
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movie_director_file = os.path.join(data_directory, "IMDBMovie_Directors.txt")
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cast_file = os.path.join(data_directory, "IMDBCast.txt")
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if not load_movies_data(movie_file, sample_size=sample_size):
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print("Failed to load movies")
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return
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if not load_persons_data(person_file):
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print("Failed to load persons")
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return
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if not load_directors_data(director_file):
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print("Failed to load directors")
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return
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if not load_movie_directors_data(movie_director_file):
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print("Failed to load movie-director relationships")
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return
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if not load_cast_data(cast_file):
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print("Failed to load cast data")
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return
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total_movies = len(movies)
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movies_with_directors = sum(1 for movie in movies.values() if movie['directors'])
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movies_with_cast = sum(1 for movie in movies.values() if movie['cast'])
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print(f"\nTotal movies loaded: {total_movies}")
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print(f"Movies with directors: {movies_with_directors}")
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print(f"Movies with cast: {movies_with_cast}")
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if connect():
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if insert_movies_to_mongodb(batch_size=1000):
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print("Data inserted into MongoDB successfully")
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test_movie = query_movie_by_name("$ (1971)")
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if test_movie:
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print(f"\nFound movie: {test_movie['movie_name']} ({test_movie.get('year', 'N/A')})")
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total_in_db = movies_collection.count_documents({})
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movies_with_directors_db = movies_collection.count_documents({"directors": {"$ne": []}})
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print(f"Total movies in database: {total_in_db}")
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print(f"Movies with directors: {movies_with_directors_db}")
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else:
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print("Failed to insert data into MongoDB")
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else:
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print("MongoDB not available")
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except Exception as e:
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print(f"Error in main execution: {e}")
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finally:
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disconnect()
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if __name__ == "__main__":
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main() |