What are context managers in Python 3.10?

What are context managers in Python 3.10?

Context managers in Python are used to manage resources, ensuring proper allocation and deallocation. They are often used with the 'with' statement.

Can you give me an example of how to use a context manager?

Sure! Here's a simple example:

with open('file.txt', 'r') as file:
    data = file.read()

This automatically closes the file after the block is executed.

What happens if an error occurs inside the context manager?

If an error occurs, the context manager will still ensure that resources are released properly. The __exit__ method is called, allowing for cleanup.

Are there any new features in context managers with Python 3.10?

Python 3.10 introduced structural pattern matching, which can be used within context managers for more complex resource management.