LdaMallet.show_topics(formatted=False) fails

[frederik-elwert]

Seems to be another side effect of the topn/num_topics issue:

In gensim/models/wrappers/ldamallet.py

            if formatted:
                topic = self.print_topic(i, topn=num_words)
            else:
                topic = self.show_topic(i, topn=num_words)

should be

            if formatted:
                topic = self.print_topic(i, topn=num_words)
            else:
                topic = self.show_topic(i, num_words=num_words)

[piskvorky]

@tmylk why the param name inconsistency?

[markroxor]

Everything seems alright here https://github.com/RaRe-Technologies/gensim/blob/develop/gensim/models/wrappers/ldamallet.py#L237

[tmylk]

Closing issue as fixed in #1066.

@piskvorky There is an inconsistency between show_topic-topn and show_topics-num_words in LdaModel which is replicated along other topic models in order to standardise the api.

show_topics and print_topics were standardised among topic models in #755 to match LdaModel to use num_words as the argument names were confusing.
Later #771 changed show_topic and print_topic to use num_words just in ldamallet. That was a way to standardise it with show_topics, but in retrospect it was not the best move.
Then print_topic was changed back to use topn like all the other models do when ldamallet inherited from BaseTopicModel in #995. Though show_topic has remained - that is the inconsistency you see above.

Raised an issue #1198

[piskvorky]

Alright, makes sense, thanks. Let's make it consistent, definitely.