advanced patterns with context managers in Python 3.10 when handling exceptions
I'm trying to implement Could someone explain I'm working with a confusing scenario with context managers in Python 3.10... I implemented a simple context manager to handle file operations, but it doesn't seem to be properly managing exceptions as I expected. The context manager is supposed to clean up resources when an exception is raised, but I'm seeing unexpected behavior. Here’s a basic version of my context manager: ```python class FileHandler: def __init__(self, filename): self.filename = filename self.file = None def __enter__(self): self.file = open(self.filename, 'w') return self.file def __exit__(self, exc_type, exc_value, traceback): if self.file: self.file.close() if exc_type is not None: print(f"Exception type: {exc_type}, Exception value: {exc_value}") return True # suppress the exception # Usage try: with FileHandler('test.txt') as f: f.write('Hello, world!') raise ValueError('An behavior occurred') # This is the problematic line except Exception as e: print(f'Caught an exception: {e}') ``` When I run this code, I get the following output: ``` Exception type: <class 'ValueError'>, Exception value: An behavior occurred Caught an exception: An behavior occurred ``` I expected that since I'm returning `True` in the `__exit__` method, the exception would not be propagated outside the context manager. However, it seems that the exception is still caught by the outer `try-except` block. I also tried changing the return value in `__exit__` to `False`, which caused the exception to propagate correctly. However, I really want to suppress the exception. Is there something specific to Python 3.10 that I might be missing? Or is there a best practice for handling exceptions in context managers that I haven't followed? Any insights would be greatly appreciated! My development environment is Windows. I'm coming from a different tech stack and learning Python. Any advice would be much appreciated. I've been using Python for about a year now. Cheers for any assistance!