What are some examples of context managers in Python?

What are some examples of context managers in Python?

Context managers in Python are used to manage resources efficiently. A common example is the with statement for file handling.

Can you show me a code example using a context manager for file operations?

Sure! Here's a simple example:

with open('file.txt', 'r') as file:
    data = file.read()
print(data)
``` This automatically closes the file after the block.

Are there any other built-in context managers?

Yes, another built-in context manager is threading.Lock, which is used to manage access to shared resources in multithreading.

How can I create my own context manager?

You can create a custom context manager by defining a class with __enter__ and __exit__ methods, or by using the contextlib module.