Add size to lru_cache

[gsasikiran]

/usr/local/lib/python3.7/dist-packages/zeroshot_topics/__init__.py in <module>()
      1 __version__ = '0.1.0'
      2 
----> 3 from .zeroshot_tm import ZeroShotTopicFinder

/usr/local/lib/python3.7/dist-packages/zeroshot_topics/zeroshot_tm.py in <module>()
      1 import attr
      2 from keybert import KeyBERT
----> 3 from .utils import load_zeroshot_model
      4 from nltk.corpus import wordnet as wn
      5 

/usr/local/lib/python3.7/dist-packages/zeroshot_topics/utils.py in <module>()
      4 
      5 @lru_cache
----> 6 def load_zeroshot_model(model_name="valhalla/distilbart-mnli-12-6"):
      7     classifier = pipeline("zero-shot-classification", model=model_name)
      8     return classifier

/usr/lib/python3.7/functools.py in lru_cache(maxsize, typed)
    488             maxsize = 0
    489     elif maxsize is not None:
--> 490         raise TypeError('Expected maxsize to be an integer or None')
    491 
    492     def decorating_function(user_function):

TypeError: Expected maxsize to be an integer or None

I assume that you have to provide, maxsize parameter to lru_cache. Worked for me, when I provided the parameter.

[JosephGatto]

Also getting this error (on Colab )

[gsasikiran]

@JosephGatto I also got that error on colab only.

Also getting this error (on Colab )

[AnjanaRita]

@gsasikiran was not able to replicate this on my local, but we could definitely set the maxsize to ensure this error does not occur again. If possible, could you open a PR with the maxsize fix you mentioned, I can merge it right away.

[gsasikiran]

@AnjanaRita I have considered 'maxsize' to be 'None', as the model is bigger and am not sure, how much max size is required. If you would prefer to push the same, I will.

[pascalhuszar]

Also got this error but then i changed the python version to 3.8 and the problem no longer occur.
According to this stackoverflow post, the @lru_cache decorator in utils.py needs parantheses, at least in py3.7.
In py3.8 it works fine without.

But i got a different error/problem after searching for topics. It seems that nltk.download('wordnet') is missing. Because i get the warning after executing zsmodel.find_topic(text, n_topic=2)

[gsasikiran]

@AnjanaRita You should allow my username to push the files. Or you can add the paranthesis and push yourself, along with nltk.download("wordnet")