How to implement guide with python 3.11's context managers not releasing resources properly
I've looked through the documentation and I'm still confused about I've been researching this but I'm stuck on something that should probably be simple... After trying multiple solutions online, I still can't figure this out. I'm currently working with an scenario with a context manager that I've implemented in Python 3.11. The context manager is supposed to handle the opening and closing of a database connection, but it seems like the connection isn't being released properly after I exit the context. Here's a simplified version of my code: ```python import sqlite3 class DatabaseConnection: def __init__(self, db_file): self.db_file = db_file self.connection = None def __enter__(self): self.connection = sqlite3.connect(self.db_file) return self.connection def __exit__(self, exc_type, exc_value, traceback): if self.connection: self.connection.close() print('Connection closed') # Usage with DatabaseConnection('my_database.db') as conn: cursor = conn.cursor() cursor.execute('SELECT * FROM my_table') print(cursor.fetchall()) ``` After executing this code, I expect to see 'Connection closed' printed in the console, indicating that the connection is being closed. However, I'm noticing that the connection sometimes remains open when I run multiple queries in succession, leading to the following behavior: ``` OperationalError: database is locked ``` I also tried adding a delay before the context exits as a workaround, but it didn’t solve the question. The database is relatively lightweight, so I don't believe there should be any important locking issues. I've confirmed that there are no other long-running transactions in the database at the same time. Am I missing something in the context manager's implementation? How can I ensure that resources are properly released after each use? Any ideas what could be causing this? I'm working on a API that needs to handle this. What's the best practice here? For reference, this is a production REST API. Am I missing something obvious?