<s> import sys , re , operator , string <EOL> class WordFrequencyFramework : <EOL> _load_event_handlers = [ ] <EOL> _dowork_event_handlers = [ ] <EOL> _end_event_handlers = [ ] <EOL> def register_for_load_event ( self , handler ) : <EOL> self . _load_event_handlers . append ( handler ) <EOL> def register_for_dowork_event ( self , handler ) : <EOL> self . _dowork_event_handlers . append ( handler ) <EOL> def register_for_end_event ( self , handler ) : <EOL> self . _end_event_handlers . append ( handler ) <EOL> def run ( self , path_to_file ) : <EOL> for h in self . _load_event_handlers : <EOL> h ( path_to_file ) <EOL> for h in self . _dowork_event_handlers : <EOL> h ( ) <EOL> for h in self . _end_event_handlers : <EOL> h ( ) <EOL> class DataStorage : <EOL> """<STR_LIT>""" <EOL> _data = '<STR_LIT>' <EOL> _stop_word_filter = None <EOL> _word_event_handlers = [ ] <EOL> def __init__ ( self , wfapp , stop_word_filter ) : <EOL> self . _stop_word_filter = stop_word_filter <EOL> wfapp . register_for_load_event ( self . __load ) <EOL> wfapp . register_for_dowork_event ( self . __produce_words ) <EOL> def __load ( self , path_to_file ) : <EOL> with open ( path_to_file ) as f : <EOL> self . _data = f . read ( ) <EOL> pattern = re . compile ( '<STR_LIT>' ) <EOL> self . _data = pattern . sub ( '<STR_LIT:U+0020>' , self . _data ) . lower ( ) <EOL> def __produce_words ( self ) : <EOL> """<STR_LIT>""" <EOL> data_str = '<STR_LIT>' . join ( self . _data ) <EOL> for w in data_str . split ( ) : <EOL> if not self . _stop_word_filter . is_stop_word ( w ) : <EOL> for h in self . _word_event_handlers : <EOL> h ( w ) <EOL> def register_for_word_event ( self , handler ) : <EOL> self . _word_event_handlers . append ( handler ) <EOL> class StopWordFilter : <EOL> """<STR_LIT>""" <EOL> _stop_words = [ ] <EOL> def __init__ ( self , wfapp ) : <EOL> wfapp . register_for_load_event ( self . __load ) <EOL> def __load ( self , ignore ) : <EOL> with open ( '<STR_LIT>' ) as f : <EOL> self . _stop_words = f . read ( ) . split ( '<STR_LIT:U+002C>' ) <EOL> self . _stop_words . extend ( list ( string . ascii_lowercase ) ) <EOL> def is_stop_word ( self , word ) : <EOL> return word in self . _stop_words <EOL> class WordFrequencyCounter : <EOL> """<STR_LIT>""" <EOL> _word_freqs = { } <EOL> def __init__ ( self , wfapp , data_storage ) : <EOL> data_storage . register_for_word_event ( self . __increment_count ) <EOL> wfapp . register_for_end_event ( self . __print_freqs ) <EOL> def __increment_count ( self , word ) : <EOL> if word in self . _word_freqs : <EOL> self . _word_freqs [ word ] += <NUM_LIT:1> <EOL> else : <EOL> self . _word_freqs [ word ] = <NUM_LIT:1> <EOL> def __print_freqs ( self ) : <EOL> word_freqs = sorted ( self . _word_freqs . iteritems ( ) , key = operator . itemgetter ( <NUM_LIT:1> ) , reverse = True ) <EOL> for ( w , c ) in word_freqs [ <NUM_LIT:0> : <NUM_LIT> ] : <EOL> print w , '<STR_LIT>' , c <EOL> wfapp = WordFrequencyFramework ( ) <EOL> stop_word_filter = StopWordFilter ( wfapp ) <EOL> data_storage = DataStorage ( wfapp , stop_word_filter ) <EOL> word_freq_counter = WordFrequencyCounter ( wfapp , data_storage ) <EOL> wfapp . run ( sys . argv [ <NUM_LIT:1> ] ) </s>
