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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 lookup_generic(self, obj, as_of_date, country_code):
 """ Convert an object into an Asset or sequence of Assets. This method exists primarily as a convenience for implementing user-facing APIs that can handle multiple kinds of input. It should not be used for internal code where we already know the expected types of our inputs. Parameters obj : int, str, Asset, ContinuousFuture, or iterable The object to be converted into one or more Assets. Integers are interpreted as sids. Strings are interpreted as tickers. Assets and ContinuousFutures are returned unchanged. as_of_date : pd.Timestamp or None Timestamp to use to disambiguate ticker lookups. Has the same semantics as in `lookup_symbol`. country_code : str or None ISO-3166 country code to use to disambiguate ticker lookups. Has the same semantics as in `lookup_symbol`. Returns ------- matches, missing : tuple ``matches`` is the result of the conversion. ``missing`` is a list containing any values that couldn't be resolved. If ``obj`` is not an iterable, ``missing`` will be an empty list. """

        matches = []
        missing = []

        # Interpret input as scalar.
        if isinstance(obj, (AssetConvertible, ContinuousFuture)):
            self._lookup_generic_scalar(
                obj=obj,
                as_of_date=as_of_date,
                country_code=country_code,
                matches=matches,
                missing=missing,
            )
            try:
                return matches[0], missing
            except IndexError:
                if hasattr(obj, '__int__'):
                    raise SidsNotFound(sids=[obj])
                else:
                    raise SymbolNotFound(symbol=obj)

        # Interpret input as iterable.
        try:
            iterator = iter(obj)
        except TypeError:
            raise NotAssetConvertible(
                "Input was not a AssetConvertible "
                "or iterable of AssetConvertible."
            )

        for obj in iterator:
            self._lookup_generic_scalar(
                obj=obj,
                as_of_date=as_of_date,
                country_code=country_code,
                matches=matches,
                missing=missing,
            )

        return matches, missing