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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 async def get_json(self, url, timeout=30, astext=False, exceptions=False):
 """Get URL and parse JSON from text."""

        try:
            with async_timeout.timeout(timeout):
                res = await self._aio_session.get(url)
                if res.status != 200:
                    _LOGGER.error("QSUSB returned %s [%s]", res.status, url)
                    return None
                res_text = await res.text()
        except (aiohttp.client_exceptions.ClientError,
                asyncio.TimeoutError) as exc:
            if exceptions:
                raise exc
            return None

        if astext:
            return res_text

        try:
            return json.loads(res_text)
        except json.decoder.JSONDecodeError:
            if res_text.strip(" ") == "":
                return None
            _LOGGER.error("Could not decode %s [%s]", res_text, url)