with — Easy Examples

Wraps a block with a context manager for automatic setup/teardown

EasyIntermediateAdvancedExpert

Context managers basics

Using 'with' for automatic cleanup.

python
# with ensures cleanup happens even if errors occur
class ManagedFile:
    def __init__(self, name):
        self.name = name

    def __enter__(self):
        print(f"Opening {self.name}")
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        print(f"Closing {self.name}")
        return False

with ManagedFile("data.txt") as f:
    print(f"Working with {f.name}")

print("File is now closed")
Expected Output
Opening data.txt
Working with data.txt
Closing data.txt
File is now closed

'with' calls __enter__ at the start and __exit__ at the end, guaranteeing cleanup even if exceptions occur.

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