Class closing

Lib/contextlib.py:342–364

Context to automatically close something at the end of a block. Code like this: with closing( .open( )) as f: is equivalent to this: f = .open( ) try: finally: f.close()

class closing(AbstractContextManager):
    """Context to automatically close something at the end of a block.

    Code like this:

        with closing(<module>.open(<arguments>)) as f:
            <block>

    is equivalent to this:

        f = <module>.open(<arguments>)
        try:
            <block>
        finally:
            f.close()

    """
    def __init__(self, thing):
        self.thing = thing
    def __enter__(self):
        return self.thing
    def __exit__(self, *exc_info):
        self.thing.close()


class aclosing(AbstractAsyncContextManager):