pydpf AttributeError `'dict' object has no attribute 'return_arrays'`

James Derrick

I downloaded Ansys Student and pydpf and tried to run an example.

This example, specifically: https://dpf.docs.pyansys.com/version/stable/examples/02-modal_analyses/01-plot_and_animate_modes.html#sphx-glr-examples-02-modal-analyses-01-plot-and-animate-modes-py

I have Ansys Student 24R1 and

ansys-dpf-composites==0.4.0
ansys-dpf-core==0.10.1
ansys-dpf-gate==0.4.1
ansys-dpf-gatebin==0.4.1
ansys-dpf-post==0.6.0

The error trace looks like this

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Cell In[3], line 9
      6 unit = freq_support.time_frequencies.unit
      8 # For each ID in the scoping
----> 9 for freq_set in freq_scoping:
     10     # Get the associated frequency in the time_freq_support
     11     freq = freq_support.get_frequency(cumulative_index=freq_set - 1)
     12     # Get the associated mode shape as a displacement field

File ~\OneDrive - ANSYS, Inc\Documents\GitHub\PyConLabSetup\venv\Lib\site-packages\ansys\dpf\core\scoping.py:312, in Scoping.__iter__(self)
    311 def __iter__(self):
--> 312     return self.ids.__iter__()

File ~\OneDrive - ANSYS, Inc\Documents\GitHub\PyConLabSetup\venv\Lib\site-packages\ansys\dpf\core\scoping.py:279, in Scoping.ids(self)
    261 @property
    262 def ids(self):
    263     """Retrieve a list of IDs in the scoping.
    264 
    265     Returns
   (...)
    277     Print a progress bar.
    278     """
--> 279     return self._get_ids()

File ~\OneDrive - ANSYS, Inc\Documents\GitHub\PyConLabSetup\venv\Lib\site-packages\ansys\dpf\core\scoping.py:172, in Scoping._get_ids(self, np_array)
    169 if np_array == None:
    170     from ansys.dpf.core import settings
--> 172     np_array = settings.get_runtime_client_config(self._server).return_arrays
    173 try:
    174     vec = dpf_vector.DPFVectorInt(
    175         client=self._server.client,
    176         api=self._server.get_api_for_type(
   (...)
    179         ),
    180     )

AttributeError: 'dict' object has no attribute 'return_arrays'

Have I found a bug or done something wrong?

James Derrick

OK Once I installed ansys-dpf-core==0.11.0 it gave a new self-explanatory error and once obeyed, it all worked!

E       ImportError: Error during import of ansys-dpf-core:
E       detected one of ['ansys-dpf-gatebin', 'ansys-dpf-gate', 'ansys-grpc-dpf'] installed. The current version of ansys-dpf-core requires uninstalling these previous dependencies to run correctly.

Rajesh Meena

This is due to discontinuation of ansys-dpf-gate module. Since this virtual environment was still having dpf-gate client, the dpf core ended up using older dpf gate source code.

With recent versions, dpf-gate is shipped with ansys-dpf-core itself. if you still have dpf-gate then it would throw warning.

You can use only these, if you want to use specific version of clients. Else, use latest versions.
ansys-dpf-composites==0.4.0
ansys-dpf-core==0.10.1
ansys-dpf-post==0.6.0

James Derrick

@Rajesh Meena Thanks for your input, I'm afraid this hasn't fixed it for me. I did a completely clean venv with Python and just installed ansys-dpf-core and jupyterlab then tried to run the example again (this should have worked).

It did not because

File ~\dpfvenv\Lib\site-packages\ansys\dpf\core\plotter.py:44, in _PyVistaPlotter.__init__(self, **kwargs)
     42 def __init__(self, **kwargs):
     43     # Import pyvista
---> 44     from ansys.dpf.core.vtk_helper import PyVistaImportError
     46     try:
     47         import pyvista as pv

File ~\dpfvenv\Lib\site-packages\ansys\dpf\core\vtk_helper.py:2
      1 import numpy as np
----> 2 import pyvista as pv
      3 import ansys.dpf.core as dpf
      4 from ansys.dpf.core import errors

ModuleNotFoundError: No module named 'pyvista'

James Derrick

It did work once pyvista was installed, however.

KristianHansen

@James Derrick said:
OK Once I installed ansys-dpf-core==0.11.0 it gave a new self-explanatory error and once obeyed, it all worked!

E       ImportError: Error during import of ansys-dpf-core:
E       detected one of ['ansys-dpf-gatebin', 'ansys-dpf-gate', 'ansys-grpc-dpf'] installed. The current version of ansys-dpf-core requires uninstalling these previous dependencies to run correctly.

I am having the same issue!

I have just performed a fresh install of ANSYS2024R1, and setup a new venv.
In this venv i have run the following commands:

pip install pyansys
pip install spyder

When doing this, i encountered the error "AttributeError: 'dict' object has no attribute 'return_arrays'"

To solve the issue, i updated to ansys-dpf-core==0.11.0:

pip install --force-reinstall -v "ansys-dpf-core==0.11.0"

And I recieved the same self-explanatory error you encountered:

E ImportError: Error during import of ansys-dpf-core:
E detected one of ['ansys-dpf-gatebin', 'ansys-dpf-gate', 'ansys-grpc-dpf'] installed. The current version of ansys-dpf-core requires uninstalling these previous dependencies to run correctly.

So solve the issue, i performed:

pip uninstall ansys-dpf-gatebin
pip uninstall ansys-dpf-gate
pip uninstall ansys-grpc-dpf

Now i just receive the following error:

ModuleNotFoundError: No module named 'ansys.dpf.gate'

... Obviously i just removed ansys.dpf.gate, but I thought that was the point?
Can anyone please help me?

KristianHansen

Update:
I started over... New venv installed pyansys=2024.1.2

got error: "AttributeError: 'dict' object has no attribute 'return_arrays'"

updated dpf core: pip install ansys-dpf-core==0.11.0

got error: E detected one of ['ansys-dpf-gatebin', 'ansys-dpf-gate', 'ansys-grpc-dpf'] installed...

reinstalled old dpf core: pip install ansys-dpf-core==0.10.1

Now everything works...

TLDR; in my case, simply forcing the install of dpf core 0.10.1 fixed it...

pip install ansys-dpf-core==0.10.1

Paul Profizi

Hello everyone,
Just to confirm, ansys-dpf-core 0.10.1 should not have ansys-dpf-gate, ansys-dpf-gatebin or ansys-grpc-dpf installed along with it.
This is why 0.11.0 now raises an Error.
ansys-dpf-core 0.10.1 installed in a fresh venv will not install ansys-dpf-gate, gatebin or grpc-dpf, and should not raise the initial issue anymore.

The issue you got hen installing everything from the start is probably due to the "pyansys" module still marking ansys-dpf-gate as required.

James Derrick

Hi @Paul Profizi that's good to know! I think I ended up in this situation after doing pip install pyansys so do you know if the bundle has also fixed it?

Paul Profizi

@James Derrick said:
@Rajesh Meena Thanks for your input, I'm afraid this hasn't fixed it for me. I did a completely clean venv with Python and just installed ansys-dpf-core and jupyterlab then tried to run the example again (this should have worked).

It did not because

File ~\dpfvenv\Lib\site-packages\ansys\dpf\core\plotter.py:44, in _PyVistaPlotter.__init__(self, **kwargs)
     42 def __init__(self, **kwargs):
     43     # Import pyvista
---> 44     from ansys.dpf.core.vtk_helper import PyVistaImportError
     46     try:
     47         import pyvista as pv

File ~\dpfvenv\Lib\site-packages\ansys\dpf\core\vtk_helper.py:2
      1 import numpy as np
----> 2 import pyvista as pv
      3 import ansys.dpf.core as dpf
      4 from ansys.dpf.core import errors

ModuleNotFoundError: No module named 'pyvista'

@James Derrick ah you found an error. This is supposed to raise an explicit error telling the user to install plotting dependencies to use plotting features. Will fix.

Paul Profizi

@James Derrick said:
Hi @Paul Profizi that's good to know! I think I ended up in this situation after doing pip install pyansys so do you know if the bundle has also fixed it?

I just checked and the latest PyAnsys meta package indeed contains ansys-dpf-gate as a dependency along with ansys-dpf-core 0.10.1, which is wrong. Will tell them to fix and release.