<s> from collections import OrderedDict <EOL> from rx import Observable , AnonymousObservable <EOL> from rx . subjects import Subject <EOL> from rx . disposables import CompositeDisposable , RefCountDisposable , SingleAssignmentDisposable <EOL> from rx . internal . basic import default_comparer , identity <EOL> from rx . linq . groupedobservable import GroupedObservable <EOL> from rx . internal import extensionmethod <EOL> @ extensionmethod ( Observable ) <EOL> def group_by_until ( self , key_selector , element_selector , duration_selector , <EOL> comparer = None ) : <EOL> """<STR_LIT>""" <EOL> source = self <EOL> element_selector = element_selector or identity <EOL> comparer = comparer or default_comparer <EOL> def subscribe ( observer ) : <EOL> mapping = OrderedDict ( ) <EOL> group_disposable = CompositeDisposable ( ) <EOL> ref_count_disposable = RefCountDisposable ( group_disposable ) <EOL> def on_next ( x ) : <EOL> writer = None <EOL> key = None <EOL> try : <EOL> key = key_selector ( x ) <EOL> except Exception as e : <EOL> for w in mapping . values ( ) : <EOL> w . on_error ( e ) <EOL> observer . on_error ( e ) <EOL> return <EOL> fire_new_map_entry = False <EOL> writer = mapping . get ( key ) <EOL> if not writer : <EOL> writer = Subject ( ) <EOL> mapping [ key ] = writer <EOL> fire_new_map_entry = True <EOL> if fire_new_map_entry : <EOL> group = GroupedObservable ( key , writer , ref_count_disposable ) <EOL> duration_group = GroupedObservable ( key , writer ) <EOL> try : <EOL> duration = duration_selector ( duration_group ) <EOL> except Exception as e : <EOL> for w in mapping . values ( ) : <EOL> w . on_error ( e ) <EOL> observer . on_error ( e ) <EOL> return <EOL> observer . on_next ( group ) <EOL> md = SingleAssignmentDisposable ( ) <EOL> group_disposable . add ( md ) <EOL> def expire ( ) : <EOL> if mapping [ key ] : <EOL> del mapping [ key ] <EOL> writer . on_completed ( ) <EOL> group_disposable . remove ( md ) <EOL> def on_next ( value ) : <EOL> pass <EOL> def on_error ( exn ) : <EOL> for wr in mapping . values ( ) : <EOL> wr . on_error ( exn ) <EOL> observer . on_error ( exn ) <EOL> def on_completed ( ) : <EOL> expire ( ) <EOL> md . disposable = duration . take ( <NUM_LIT:1> ) . subscribe ( on_next , on_error , on_completed ) <EOL> try : <EOL> element = element_selector ( x ) <EOL> except Exception as e : <EOL> for w in mapping . values ( ) : <EOL> w . on_error ( e ) <EOL> observer . on_error ( e ) <EOL> return <EOL> writer . on_next ( element ) <EOL> def on_error ( ex ) : <EOL> for w in mapping . values ( ) : <EOL> w . on_error ( ex ) <EOL> observer . on_error ( ex ) <EOL> def on_completed ( ) : <EOL> for w in mapping . values ( ) : <EOL> w . on_completed ( ) <EOL> observer . on_completed ( ) <EOL> group_disposable . add ( source . subscribe ( on_next , on_error , on_completed ) ) <EOL> return ref_count_disposable <EOL> return AnonymousObservable ( subscribe ) </s>
