midPython
Context Managers (with)
Updated May 4, 2026
Short answer
Automatic resource management.
Deep explanation
Ensures that setup and cleanup (like closing a database connection) happen automatically even if an error occurs.
Real-world example
Managing network sockets to ensure they close properly after data transfer.
Common mistakes
- Forgetting to use 'with' for files, leading to memory leaks or file locks.
Follow-up questions
- How to make a custom one?