ContextManager with functions

# Usage example of contextmanager with a function
import os
from contextlib import contextmanager


@contextmanager
def change_dir(destination):
    try:  # Used for setup
        cwd = os.getcwd()
        os.chdir(destination)
        yield  # Context manager 'with' statement stops here
    finally:  # Used for teardown
        os.chdir(cwd)  # Called once contextmanager is done executing commands in with statement


with change_dir('folder'):
    print(os.listdir)