I am trying to run zfit on my Ubuntu 22.04 laptop. I installed it like this:

python -m venv venv
source venv/bin/activate
pip install zfit

I’ve run this code (taken from https://github.com/zfit/zfit):

import zfit
import numpy as np

obs = zfit.Space('x', -10, 10)

# create the model
mu    = zfit.Parameter("mu"   , 2.4, -1, 5)
sigma = zfit.Parameter("sigma", 1.3,  0, 5)
gauss = zfit.pdf.Gauss(obs=obs, mu=mu, sigma=sigma)

# load the data
data_np = np.random.normal(size=10000)
data = zfit.Data(obs=obs, data=data_np)
# or sample from model
data = gauss.sample()

and I’ve got this error:

Traceback (most recent call last):
  File "/home/pleskot/ftft/test.py", line 15, in <module>
    data = gauss.sample()
  File "/home/pleskot/ftft/venv/lib/python3.10/site-packages/zfit/core/basemodel.py", line 1196, in sample
    tensor = run_tf(n=n, limits=limits, x=xclean)
  File "/home/pleskot/ftft/venv/lib/python3.10/site-packages/zfit/core/basemodel.py", line 1192, in run_tf
    return self._single_hook_sample(n=n, limits=limits, x=x)  # todo: make data a composite object
  File "/home/pleskot/ftft/venv/lib/python3.10/site-packages/zfit/z/zextension.py", line 332, in concrete_func
    result = func_to_run(*args, **kwargs)
  File "/home/pleskot/ftft/venv/lib/python3.10/site-packages/tensorflow/python/util/traceback_utils.py", line 153, in error_handler
    raise e.with_traceback(filtered_tb) from None
  File "/home/pleskot/ftft/venv/lib/python3.10/site-packages/zfit/core/basemodel.py", line 1202, in _single_hook_sample
    return self._hook_sample(n=n, limits=limits)
  File "/home/pleskot/ftft/venv/lib/python3.10/site-packages/zfit/core/basepdf.py", line 785, in _hook_sample
    raise tf.errors.InvalidArgumentError(msg)
TypeError: InvalidArgumentError.__init__() missing 2 required positional arguments: 'op' and 'message'

I’ve experienced the same thing with Python 3.11 on the same system.