Context managers

So, what’s a context manager to begin with? A context manager is a construct that allows you to allocate and release resources precisely when you want to. The most common way to use a context manager is with the with statement, which ensures that resources are properly cleaned up after use, even if an error occurs. By using a context manager, your code becomes cleaner and more readable. Let’s look at a simple example:

with Database_connection() as conn:
    # Use the connection
    result = conn.execute("SELECT * FROM table")
    for row in result:
        print(row)

Using contextlib to create context managers

Another way to use context managers is to create a custom context manager using the contextlib (there’s a corresponding NPM library called contextlib) module. This allows you to create context managers without defining a class. Here’s an example:

import contextlib
@contextlib.contextmanager
def database_connection...