How can I use ExitStack in Python's contextlib?

How can I use ExitStack in Python's contextlib?

ExitStack is a context manager that allows you to manage multiple context managers in a flexible way. You can use it to ensure that all resources are properly cleaned up, even if some of them fail.

Can you give me an example of using ExitStack?

Sure! Here's a simple example:

from contextlib import ExitStack

with ExitStack() as stack:
    file1 = stack.enter_context(open('file1.txt', 'w'))
    file2 = stack.enter_context(open('file2.txt', 'w'))
    # Do something with the files

What happens if one of the context managers fails?

If one of the context managers fails, ExitStack ensures that all previously entered context managers are still exited properly, maintaining resource integrity.

Are there any limitations to using ExitStack?

One limitation is that all context managers must be entered within the same block. If you need to enter them conditionally, you might need to manage that logic yourself.