Kats throw an error module 'packaging.version' has no attribute 'LegacyVersion'

[KansaiUser]

This is the first time using Kats

I tried to use it with python 3.6 but it threw an error

future feature annotations is not defined

so instead I used python 3.9 and now when I do

from kats.detectors.outlier import OutlierDetector
outlier_detector = OutlierDetector(ts_day, "additive")

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Cell In[19], line 1
----> 1 from kats.detectors.outlier import OutlierDetector
      3 outlier_detector = OutlierDetector(ts_day, "additive")

File ~/miniconda3/envs/data_analysisPy39/lib/python3.9/site-packages/kats/__init__.py:6
      1 # Copyright (c) Meta Platforms, Inc. and affiliates.
      2 #
      3 # This source code is licensed under the MIT license found in the
      4 # LICENSE file in the root directory of this source tree.
----> 6 from . import compat  # noqa # usort: skip
      7 from . import consts  # noqa # usort: skip
      8 from . import data  # noqa # usort: skip

File ~/miniconda3/envs/data_analysisPy39/lib/python3.9/site-packages/kats/compat/__init__.py:6
      1 # Copyright (c) Meta Platforms, Inc. and affiliates.
      2 #
      3 # This source code is licensed under the MIT license found in the
      4 # LICENSE file in the root directory of this source tree.
----> 6 from . import compat  # noqa # usort: skip
      7 from . import pandas  # noqa # usort: skip
      8 from . import statsmodels  # noqa # usort: skip

File ~/miniconda3/envs/data_analysisPy39/lib/python3.9/site-packages/kats/compat/compat.py:19
     14 from typing import Callable, Union
     16 from packaging import version as pv
---> 19 V = Union[str, "Version", pv.Version, pv.LegacyVersion]
     22 class Version:
     23     """Extend packaging Version to allow comparing to version strings.
     24 
     25     Wraps instead of extends, because pv.parse can return either a
     26     pv.Version or a pv.LegacyVersion.
     27     """

AttributeError: module 'packaging.version' has no attribute 'LegacyVersion'

How can I be able to use kats for that simple thing, without an error?

[cbergmeir]

Hi, I'm also new to Kats and ran into the same issue. It is caused by a wrong version of the "packaging" package. I was able to fix it with: conda install packaging=21.3

[rohanfb]

Fixed with 5d5c708d2975885d6f5ec24f5ed03a520bdcce99 but use the latest working build as there was another bug fixed after this.