In article <43a68990-d6cf-4362-8c47-b13ce780b...@googlegroups.com>, Token Type <typeto...@gmail.com> wrote:
> Thanks very much for all of your tips. Take noun as an example. First, I need > find all the lemma_names in all the synsets whose pos is 'n'. Second, for > each lemma_name, I will check all their sense number. > > 1) Surely,we can know the number of synset whose pos is noun by > >>> len([synset for synset in wn.all_synsets('n')]) > 82115 > > However, confusingly it is unsuccessful to get a list of lemma names of these > synsets by > >>> lemma_list = [synset.lemma_names for synset in wn.all_synsets('n')] > >>> lemma_list[:20] > [['entity'], ['physical_entity'], ['abstraction', 'abstract_entity'], > ['thing'], ['object', 'physical_object'], ['whole', 'unit'], ['congener'], > ['living_thing', 'animate_thing'], ['organism', 'being'], ['benthos'], > ['dwarf'], ['heterotroph'], ['parent'], ['life'], ['biont'], ['cell'], > ['causal_agent', 'cause', 'causal_agency'], ['person', 'individual', > 'someone', 'somebody', 'mortal', 'soul'], ['animal', 'animate_being', > 'beast', 'brute', 'creature', 'fauna'], ['plant', 'flora', 'plant_life']] > >>> type(lemma_list) > <type 'list'> > > Though the lemma_list is a list in the above codes, it contains so many > unnecessary [ and ]. How come it is like this? But what we desire and expect > is a list without this brackets. Confused, I am really curious to know why. It looks like synset.lemma_names gets you a list. And then you're taking all those lists and forming them into a list of lists: >>> lemma_list = [synset.lemma_names for synset in wn.all_synsets('n')] I think what you want to study is the difference between list.append() and list.extend(). When you use the list builder syntax, you're essentially writing a loop which does append operations. The above is the same as if you wrote: lemma_list = list() for synset in wn.all_synsets('n'): lemma_list.append(synset.lemma_names) and I think what you're looking for is: lemma_list = list() for synset in wn.all_synsets('n'): lemma_list.extend(synset.lemma_names) -- http://mail.python.org/mailman/listinfo/python-list