Sort and return the list, set or sorted set at ``name``.

        ``start`` and ``num`` allow for paging through the sorted data

        ``by`` allows using an external key to weight and sort the items.
            Use an "*" to indicate where in the key the item value is located

        ``get`` allows for returning items from external keys rather than the
            sorted data itself.  Use an "*" to indicate where int he key
            the item value is located

        ``desc`` allows for reversing the sort

        ``alpha`` allows for sorting lexicographically rather than numerically

        ``store`` allows for storing the result of the sort into
            the key ``store``

        ``groups`` if set to True and if ``get`` contains at least two
            elements, sort will return a list of tuples, each containing the
            values fetched from the arguments to ``get``.

def sort(self, name, start=None, num=None, by=None, get=None,
             desc=False, alpha=False, store=None, groups=False):
        """
        Sort and return the list, set or sorted set at ``name``.

        ``start`` and ``num`` allow for paging through the sorted data

        ``by`` allows using an external key to weight and sort the items.
            Use an "*" to indicate where in the key the item value is located

        ``get`` allows for returning items from external keys rather than the
            sorted data itself.  Use an "*" to indicate where int he key
            the item value is located

        ``desc`` allows for reversing the sort

        ``alpha`` allows for sorting lexicographically rather than numerically

        ``store`` allows for storing the result of the sort into
            the key ``store``

        ``groups`` if set to True and if ``get`` contains at least two
            elements, sort will return a list of tuples, each containing the
            values fetched from the arguments to ``get``.

        """
        if (start is not None and num is None) or \
                (num is not None and start is None):
            raise DataError("``start`` and ``num`` must both be specified")

        pieces = [name]
        if by is not None:
            pieces.append(Token.get_token('BY'))
            pieces.append(by)
        if start is not None and num is not None:
            pieces.append(Token.get_token('LIMIT'))
            pieces.append(start)
            pieces.append(num)
        if get is not None:
            # If get is a string assume we want to get a single value.
            # Otherwise assume it's an interable and we want to get multiple
            # values. We can't just iterate blindly because strings are
            # iterable.
            if isinstance(get, (bytes, basestring)):
                pieces.append(Token.get_token('GET'))
                pieces.append(get)
            else:
                for g in get:
                    pieces.append(Token.get_token('GET'))
                    pieces.append(g)
        if desc:
            pieces.append(Token.get_token('DESC'))
        if alpha:
            pieces.append(Token.get_token('ALPHA'))
        if store is not None:
            pieces.append(Token.get_token('STORE'))
            pieces.append(store)

        if groups:
            if not get or isinstance(get, (bytes, basestring)) or len(get) < 2:
                raise DataError('when using "groups" the "get" argument '
                                'must be specified and contain at least '
                                'two keys')

        options = {'groups': len(get) if groups else None}
        return self.execute_command('SORT', *pieces, **options)