Can you explain Python context managers with examples?

Can you explain Python context managers with examples?

Sure! A context manager in Python is used to manage resources, like files or network connections, ensuring they are properly acquired and released. The most common way to use a context manager is with the with statement.

Can you give me an example of using a context manager with a file?

Absolutely! Here's a simple example:

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

In this example, the file is automatically closed after the block of code is executed.

What happens if an error occurs while using a context manager?

If an error occurs within the with block, the context manager will still ensure that the resource is properly cleaned up. For instance, the file will be closed even if an exception is raised.