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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:
 def get_raw(self, url: str, _attempt=1) -> requests.Response: """Downloads a file anonymously. :raises QueryReturnedNotFoundException: When the server responds with a 404. :raises QueryReturnedForbiddenException: When the server responds with a 403. :raises ConnectionException: When download failed. .. versionadded:: 4.2.1"""

        with self.get_anonymous_session() as anonymous_session:
            resp = anonymous_session.get(url, stream=True)
        if resp.status_code == 200:
            resp.raw.decode_content = True
            return resp
        else:
            if resp.status_code == 403:
                # suspected invalid URL signature
                raise QueryReturnedForbiddenException("403 when accessing {}.".format(url))
            if resp.status_code == 404:
                # 404 not worth retrying.
                raise QueryReturnedNotFoundException("404 when accessing {}.".format(url))
            raise ConnectionException("HTTP error code {}.".format(resp.status_code))