Method close_fd

python/python3/tornado/ioloop.py:788–806

(self, fd: Union[int, _Selectable])

        return fd.fileno(), fd

    def close_fd(self, fd: Union[int, _Selectable]) -> None:
        # """Utility method to close an ``fd``.

        # If ``fd`` is a file-like object, we close it directly; otherwise
        # we use `os.close`.

        # This method is provided for use by `IOLoop` subclasses (in
        # implementations of ``IOLoop.close(all_fds=True)`` and should
        # not generally be used by application code.

        # .. versionadded:: 4.0
        # """
        try:
            if isinstance(fd, int):
                os.close(fd)
            else:
                fd.close()
        except OSError:
            pass


class _Timeout(object):