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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 outlook(self) -> dict: """Get allergen outlook."""

        try:
            return await self._request(
                'get', 'https://www.pollen.com/api/forecast/outlook')
        except RequestError as err:
            if '404' in str(err):
                raise InvalidZipError('No data returned for ZIP code')
            else:
                raise RequestError(err)