group *seq* (a set) generating pairs (*value*, *subseq*). All elements in *subseq* (a set) have *value* as sort value on this level. The union of all *subseq* gives *seq*. Elements not sorted on this level go into the last generated pair with 'None' as value. Reimplemented in AdvancedQuery::sorting::IndexSorter. Definition at line 71 of file sorting.py. 00071 : '''group *seq* (a set) generating pairs (*value*, *subseq*). All elements in *subseq* (a set) have *value* as sort value on this level. The union of all *subseq* gives *seq*. Elements not sorted on this level go into the last generated pair with 'None' as value. ''' raise NotImplementedError class IndexSorter(Sorter):
