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 ModuleNotFoundError: No module named 'pystan'

 WARNING: pip is being invoked by an old script wrapper. This will fail in a future version of pip.
Please see https://github.com/pypa/pip/issues/5599 for advice on fixing the underlying issue.
To avoid this problem you can invoke Python with '-m pip' instead of running pip directly.
Looking in links: /usr/share/pip-wheels
Requirement already satisfied: pystan in /home/jurgenriedel/.local/lib/python3.7/site-packages (3.1.1)
Requirement already satisfied: numpy<2.0,>=1.7 in /home/jurgenriedel/.local/lib/python3.7/site-packages (from pystan) (1.18.5)
Requirement already satisfied: aiohttp<4.0,>=3.6 in /home/jurgenriedel/.local/lib/python3.7/site-packages (from pystan) (3.7.4.post0)
Requirement already satisfied: clikit<0.7,>=0.6 in /home/jurgenriedel/.local/lib/python3.7/site-packages (from pystan) (0.6.2)
Requirement already satisfied: pysimdjson<4.0,>=3.2 in /home/jurgenriedel/.local/lib/python3.7/site-packages (from pystan) (3.2.0)
Requirement already satisfied: httpstan<4.5,>=4.4 in /home/jurgenriedel/.local/lib/python3.7/site-packages (from pystan) (4.4.2)
Requirement already satisfied: multidict<7.0,>=4.5 in /home/jurgenriedel/.local/lib/python3.7/site-packages (from aiohttp<4.0,>=3.6->pystan
) (5.1.0)
Requirement already satisfied: chardet<5.0,>=2.0 in /usr/lib/python3.7/site-packages (from aiohttp<4.0,>=3.6->pystan) (3.0.4)
Requirement already satisfied: async-timeout<4.0,>=3.0 in /home/jurgenriedel/.local/lib/python3.7/site-packages (from aiohttp<4.0,>=3.6->py
stan) (3.0.1)
Requirement already satisfied: typing-extensions>=3.6.5 in /home/jurgenriedel/.local/lib/python3.7/site-packages (from aiohttp<4.0,>=3.6->p
ystan) (3.7.4.2)
Requirement already satisfied: yarl<2.0,>=1.0 in /home/jurgenriedel/.local/lib/python3.7/site-packages (from aiohttp<4.0,>=3.6->pystan) (1.
6.3)
Requirement already satisfied: attrs>=17.3.0 in /usr/lib/python3.7/site-packages (from aiohttp<4.0,>=3.6->pystan) (18.1.0)
Requirement already satisfied: crashtest<0.4.0,>=0.3.0; python_version >= "3.6" and python_version < "4.0" in /home/jurgenriedel/.local/lib
/python3.7/site-packages (from clikit<0.7,>=0.6->pystan) (0.3.1)
Requirement already satisfied: pastel<0.3.0,>=0.2.0 in /home/jurgenriedel/.local/lib/python3.7/site-packages (from clikit<0.7,>=0.6->pystan
) (0.2.1)
Requirement already satisfied: pylev<2.0,>=1.3 in /home/jurgenriedel/.local/lib/python3.7/site-packages (from clikit<0.7,>=0.6->pystan) (1.
(50.3.2)
3.0)
Requirement already satisfied: webargs<8.0,>=7.0 in /home/jurgenriedel/.local/lib/python3.7/site-packages (from httpstan<4.5,>=4.4->pystan) (7.0.1)
Requirement already satisfied: setuptools>=41.0 in /home/jurgenriedel/.local/lib/python3.7/site-packages (from httpstan<4.5,>=4.4->pystan) (50.3.2)
Requirement already satisfied: marshmallow<4.0,>=3.10 in /home/jurgenriedel/.local/lib/python3.7/site-packages (from httpstan<4.5,>=4.4->pystan) (3.12.1)
Requirement already satisfied: lz4<4.0,>=3.1 in /home/jurgenriedel/.local/lib/python3.7/site-packages (from httpstan<4.5,>=4.4->pystan) (3.1.3)
Requirement already satisfied: appdirs<2.0,>=1.4 in /usr/lib/python3.7/site-packages (from httpstan<4.5,>=4.4->pystan) (1.4.3)
Requirement already satisfied: idna>=2.0 in /usr/lib/python3.7/site-packages (from yarl<2.0,>=1.0->aiohttp<4.0,>=3.6->pystan) (2.7)