How do I ensure resources are cleaned up (with statements)?

In Python, the `with` statement is used to wrap the execution of a block of code within methods defined by a context manager. This allows for the automatic management of resources, such as file streams and network connections, ensuring they are properly cleaned up after their use.

When you use a `with` statement, the context manager takes care of entering and exiting the runtime context. This means that even if an exception occurs, the cleanup code will be executed, preventing resource leaks.

Below is an example of using the `with` statement to open a file, read its contents, and ensure it is properly closed afterward.

with open('example.txt', 'r') as file: contents = file.read() print(contents)

python with statement context manager resource cleanup file handling

Related Questions

How do I avoid rehashing overhead with std::set in multithreaded code?

How do I find elements with custom comparators with std::set for embedded targets?

How do I erase elements while iterating with std::set for embedded targets?

How do I provide stable iteration order with std::unordered_map for large datasets?

How do I reserve capacity ahead of time with std::unordered_map for large datasets?

How do I erase elements while iterating with std::unordered_map in multithreaded code?

How do I provide stable iteration order with std::map for embedded targets?

How do I provide stable iteration order with std::map in multithreaded code?

How do I avoid rehashing overhead with std::map in performance-sensitive code?

How do I merge two containers efficiently with std::map for embedded targets?