def stack_cols(self, other): """Stack two :class:`Dataset` instances together by joining at the column level, and return a new combined ``Dataset`` instance. If either ``Dataset`` has headers set, than the other must as well.""" if not isinstance(other, Dataset): return if self.headers or other.headers: if not self.headers or not other.headers: raise HeadersNeeded if self.height != other.height: raise InvalidDimensions try: new_headers = self.headers + other.headers except TypeError: new_headers = None _dset = Dataset() for column in self.headers: _dset.append_col(col=self[column]) for column in other.headers: _dset.append_col(col=other[column]) _dset.headers = new_headers return _dset
