Hello everyone,

I am trying to run the scripting tutorial, and I am unable to run the code because I can't import the 'sas' package.

When I run the import statements at the top of the tutorial, i.e.

import sys
from bumps.names import *
from sasmodels.core import load_model
from sasmodels.bumps_model import Model, Experiment
from sasmodels.data import load_data, set_beam_stop, set_top

I get

---------------------------------------------------------------------------
ModuleNotFoundError Traceback (most recent call last)
Cell In[9], line 4
2 from bumps.names import *
3 from sasmodels.core import load_model
----> 4 from sasmodels.bumps_model import Model, Experiment
5 from sasmodels.data import load_data, set_beam_stop, set_top

File ~/micromamba/envs/smi_py311/lib/python3.11/site-packages/sasmodels/bumps_model.py:20
16 __all__ = ["Model", "Experiment", "BumpsParameter"]
18 import numpy as np # type: ignore
---> 20 from .data import plot_theory
21 from .direct_model import DataMixin
23 # pylint: disable=unused-import

File ~/micromamba/envs/smi_py311/lib/python3.11/site-packages/sasmodels/data.py:39
37 import numpy as np # type: ignore
38 from numpy import sqrt, sin, cos, pi
---> 39 import sas
40 # pylint: disable=unused-import
41 try:

ModuleNotFoundError: No module named 'sas'

I apparently have sasmodels installed, since I can successfully import load_model from sasmodels.core. However, it seems I am missing the sas package. I have searched online and wasn't able to find any such package. I ran a simple pip install sas, and indeed, something downloaded, but it didn't resolve the issue.

Any insights on the issue would be most appreciated.

Best,

Ian Billinge

he/him/his

Ph.D Student, Yip Lab

Dept. of Earth & Environmental Engineering

Fu Foundation School of Engineering

Columbia University in the City of New York