How can decorators and context managers be used together in Python?

How can decorators and context managers be used together in Python?

Decorators and context managers can be combined to enhance functionality. For example, you can create a decorator that uses a context manager to manage resources.

Can you give me an example of that?

Sure! Here's a simple example: a decorator that opens a file, executes a function, and then closes the file.

What does the code look like?

Here's a sample code snippet:

from contextlib import contextmanager

@contextmanager
def open_file(file_name):
    f = open(file_name, 'r')
    try:
        yield f
    finally:
        f.close()

def file_reader(func):
    def wrapper(file_name):
        with open_file(file_name) as f:
            return func(f)
    return wrapper

@file_reader
def read_first_line(f):
    return f.readline()