I get this when I try to run the sample code:

Traceback (most recent call last): File "zerotopics.py", line 1, in from zeroshot_topics import ZeroShotTopicFinder File "/Users/scharlesworth/opt/anaconda3/envs/text_analytics/lib/python3.7/site-packages/zeroshot_topics/init.py", line 3, in from .zeroshot_tm import ZeroShotTopicFinder File "/Users/scharlesworth/opt/anaconda3/envs/text_analytics/lib/python3.7/site-packages/zeroshot_topics/zeroshot_tm.py", line 3, in from .utils import load_zeroshot_model File "/Users/scharlesworth/opt/anaconda3/envs/text_analytics/lib/python3.7/site-packages/zeroshot_topics/utils.py", line 6, in def load_zeroshot_model(model_name="valhalla/distilbart-mnli-12-6"): File "/Users/scharlesworth/opt/anaconda3/envs/text_analytics/lib/python3.7/functools.py", line 490, in lru_cache raise TypeError('Expected maxsize to be an integer or None') TypeError: Expected maxsize to be an integer or None

Specifics: Python version 3.7.9

pip freeze gives (yeh this virtualenv is getting big :):

absl-py==1.0.0 aiohttp==3.8.1 aiosignal==1.2.0 alabaster==0.7.12 aniso8601==9.0.1 antlr4-python3-runtime==4.8 appnope @ file:///opt/concourse/worker/volumes/live/4f734db2-9ca8-4d8b-5b29-6ca15b4b4772/volume/appnope_1606859466979/work async-timeout==4.0.2 asynctest==0.13.0 attrs==20.3.0 Babel==2.9.1 backcall @ file:///home/ktietz/src/ci/backcall_1611930011877/work bertopic==0.6.0 blis @ file:///opt/concourse/worker/volumes/live/cd6a6bea-d063-4b62-4c10-fcc89b17d0ac/volume/cython-blis_1594246851083/work boto3==1.17.86 botocore==1.20.86 brotlipy==0.7.0 cachetools==4.2.1 catalogue==2.0.6 certifi==2020.12.5 cffi @ file:///opt/concourse/worker/volumes/live/2aa8abfe-8b8d-4889-78d9-837b74c3cd64/volume/cffi_1606255119410/work chardet @ file:///opt/concourse/worker/volumes/live/9efbf151-b45b-463d-6340-a5c399bf00b7/volume/chardet_1607706825988/work charset-normalizer==2.0.9 click==7.1.2 colorama==0.4.4 coloredlogs==15.0.1 commonmark==0.9.1 cryptography @ file:///opt/concourse/worker/volumes/live/41c3d62a-f1f8-46ce-414a-9adaf4ea7d96/volume/cryptography_1607636752064/work cycler==0.10.0 cymem @ file:///opt/concourse/worker/volumes/live/3e8d7428-f57d-4000-44e7-34ac8a744f13/volume/cymem_1605062299053/work Cython==0.29.23 dataclasses==0.6 datasets==1.17.0 decorator @ file:///home/ktietz/src/ci/decorator_1611930055503/work dill==0.3.4 docformatter==1.4 docutils==0.15.2 emoji==1.6.1 en-core-web-lg @ https://github.com/explosion/spacy-models/releases/download/en_core_web_lg-3.2.0/en_core_web_lg-3.2.0-py3-none-any.whl en-core-web-md @ https://github.com/explosion/spacy-models/releases/download/en_core_web_md-3.2.0/en_core_web_md-3.2.0-py3-none-any.whl en-core-web-sm @ https://github.com/explosion/spacy-models/releases/download/en_core_web_sm-3.2.0/en_core_web_sm-3.2.0-py3-none-any.whl en-core-web-trf @ https://github.com/explosion/spacy-models/releases/download/en_core_web_trf-3.2.0/en_core_web_trf-3.2.0-py3-none-any.whl et-xmlfile==1.1.0 fairscale==0.4.4 Faker==8.16.0 fasttext @ file:///Users/scharlesworth/fastText-0.9.2 filelock==3.0.12 flake8==4.0.1 flake8-bugbear==21.11.29 Flask==2.0.2 Flask-Cors==3.0.10 Flask-RESTful==0.3.9 frozenlist==1.2.0 fsspec==2021.11.1 future==0.18.2 gitdb==4.0.9 gitdb2==4.0.2 GitPython==3.1.24 google-api-core==1.26.2 google-api-python-client==2.0.2 google-auth==1.28.0 google-auth-httplib2==0.1.0 google-auth-oauthlib==0.4.6 googleapis-common-protos==1.53.0 grpcio==1.43.0 hdbscan==0.8.27 httplib2==0.19.0 huggingface-hub==0.2.1 humanfriendly==10.0 hydra-core==1.1.1 idna @ file:///tmp/build/80754af9/idna_1593446292537/work imagesize==1.3.0 importlib-metadata @ file:///tmp/build/80754af9/importlib-metadata_1602276842396/work importlib-resources==5.4.0 iniconfig==1.1.1 iopath==0.1.9 ipykernel @ file:///opt/concourse/worker/volumes/live/73e8766c-12c3-4f76-62a6-3dea9a7da5b7/volume/ipykernel_1596206701501/work/dist/ipykernel-5.3.4-py3-none-any.whl ipython @ file:///opt/concourse/worker/volumes/live/ac685347-76d6-4904-4b88-886c6a434f22/volume/ipython_1614616430264/work ipython-genutils @ file:///tmp/build/80754af9/ipython_genutils_1606773439826/work itsdangerous==2.0.1 jedi @ file:///opt/concourse/worker/volumes/live/5006b7b5-a924-4788-6cfe-ae05d8be8830/volume/jedi_1606932947370/work Jinja2==3.0.1 jmespath==0.10.0 joblib==1.0.1 jsonlines==3.0.0 jsonschema==3.0.2 jupyter-client @ file:///tmp/build/80754af9/jupyter_client_1601311786391/work jupyter-core @ file:///opt/concourse/worker/volumes/live/a699b83f-e941-4170-5136-bf87e3f37756/volume/jupyter_core_1612213304212/work keybert==0.5.0 kiwisolver==1.3.1 langcodes==3.3.0 llvmlite==0.36.0 loguru==0.5.3 Markdown==3.3.4 markdown-it-py==0.5.8 MarkupSafe==2.0.1 matplotlib==3.4.0 mccabe==0.6.1 mkl-fft==1.2.0 mkl-random==1.1.1 mkl-service==2.3.0 mock==4.0.3 multidict==5.2.0 multiprocess==0.70.12.2 murmurhash @ file:///opt/concourse/worker/volumes/live/9a0582f9-9097-4dab-6d7a-fcf62b4968ae/volume/murmurhash_1607456116622/work myst-parser==0.12.10 nltk==3.6.5 numba==0.53.1 numpy==1.20.2 oauthlib==3.1.1 omegaconf==2.1.1 openai==0.6.3 openpyxl==3.0.9 packaging==20.9 pandas==1.2.1 parlai==1.5.1 parquet==1.3.1 parso==0.7.0 pathy==0.6.1 pexpect @ file:///tmp/build/80754af9/pexpect_1605563209008/work pickleshare @ file:///tmp/build/80754af9/pickleshare_1606932040724/work Pillow==8.2.0 plac @ file:///opt/concourse/worker/volumes/live/a94b6881-2d18-4055-5a3c-f24036f05ef6/volume/plac_1594259982880/work pluggy==1.0.0 ply==3.11 portalocker==2.3.2 praw==7.1.0 prawcore==1.5.0 preshed @ file:///opt/concourse/worker/volumes/live/952fa955-acc7-4aa0-6766-86f802ea8ef1/volume/preshed_1608233410312/work prompt-toolkit @ file:///tmp/build/80754af9/prompt-toolkit_1616415428029/work protobuf==3.15.6 ptyprocess @ file:///tmp/build/80754af9/ptyprocess_1609355006118/work/dist/ptyprocess-0.7.0-py2.py3-none-any.whl py==1.11.0 py-gfm==1.0.2 py-rouge==1.1 py4j==0.10.7 pyarrow==6.0.1 pyasn1==0.4.8 pyasn1-modules==0.2.8 pybind11==2.6.1 pycodestyle==2.8.0 pycparser @ file:///tmp/build/80754af9/pycparser_1594388511720/work pydantic==1.8.2 pyee==8.2.2 pyflakes==2.4.0 Pygments @ file:///tmp/build/80754af9/pygments_1615143339740/work PyJWT==2.3.0 pynndescent==0.5.2 pyodbc==4.0.32 pyOpenSSL @ file:///tmp/build/80754af9/pyopenssl_1608057966937/work pyparsing==2.4.7 pyrsistent @ file:///opt/concourse/worker/volumes/live/656e0c1b-ef87-4251-4a51-1290b2351993/volume/pyrsistent_1600141745371/work PySocks @ file:///opt/concourse/worker/volumes/live/ef943889-94fc-4539-798d-461c60b77804/volume/pysocks_1605305801690/work pytest==6.2.5 pytest-datadir==1.3.1 pytest-regressions==2.2.0 python-dateutil @ file:///home/ktietz/src/ci/python-dateutil_1611928101742/work python-slugify==5.0.2 pytorch-transformers==1.2.0 pytz==2020.5 PyYAML==6.0 pyzmq==20.0.0 regex==2021.11.10 requests @ file:///tmp/build/80754af9/requests_1608241421344/work requests-mock==1.9.3 requests-oauthlib==1.3.0 requests-toolbelt==0.9.1 rich==10.16.2 rsa==4.7.2 s3transfer==0.4.2 sacremoses==0.0.44 scikit-learn==0.24.1 scipy==1.6.2 seaborn==0.11.1 sentence-transformers==1.0.4 sentencepiece==0.1.91 seqeval==0.0.5 sh==1.14.2 six @ file:///opt/concourse/worker/volumes/live/f983ba11-c9fe-4dff-7ce7-d89b95b09771/volume/six_1605205318156/work sklearn==0.0 slack-bolt==1.11.1 slack-sdk==3.13.0 slackclient==2.9.3 slackeventsapi==3.0.1 smart-open==5.2.1 smmap==5.0.0 snowballstemmer==2.2.0 spacy==3.2.0 spacy-alignments==0.8.4 spacy-legacy==3.0.8 spacy-loggers==1.0.1 spacy-sentence-bert==0.1.2 spacy-transformers==1.1.2 spark-nlp==3.0.2 Sphinx==2.2.2 sphinx-autodoc-typehints==1.10.3 sphinx-rtd-theme==1.0.0 sphinxcontrib-applehelp==1.0.2 sphinxcontrib-devhelp==1.0.2 sphinxcontrib-htmlhelp==2.0.0 sphinxcontrib-jsmath==1.0.1 sphinxcontrib-qthelp==1.0.3 sphinxcontrib-serializinghtml==1.1.5 srsly==2.4.2 subword-nmt==0.3.8 tensorboard==2.7.0 tensorboard-data-server==0.6.1 tensorboard-plugin-wit==1.8.0 tensorboardX==2.4.1 text-unidecode==1.3 thinc==8.0.13 threadpoolctl==2.1.0 thriftpy2==0.4.14 tokenizers==0.10.2 toml==0.10.2 torch==1.10.1 torchtext==0.11.1 tornado @ file:///opt/concourse/worker/volumes/live/d531d395-893c-4ca1-6a5f-717b318eb08c/volume/tornado_1606942307627/work tqdm==4.62.3 traitlets @ file:///home/ktietz/src/ci/traitlets_1611929699868/work transformers==4.11.0 typer==0.4.0 typing-extensions==3.7.4.3 umap-learn==0.5.1 Unidecode==1.3.2 untokenize==0.1.1 update-checker==0.18.0 uritemplate==3.0.1 urllib3==1.26.7 wasabi==0.8.2 wcwidth @ file:///tmp/build/80754af9/wcwidth_1593447189090/work webexteamsbot==0.1.4.2 webexteamssdk==1.6 websocket-client==0.57.0 websocket-server==0.6.4 Werkzeug==2.0.1 xlrd==2.0.1 xxhash==2.0.2 yarl==1.7.2 zeroshot-topics==0.1.0 zipp @ file:///tmp/build/80754af9/zipp_1604001098328/work

/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.