Any plan to support Python 3 for mayavi ?

Python going to release Python 3.4 soon. I think Python 3 is now very mature and main third party library (numpy, scipy, pandas, matplotlib, etc) support it now.

I am also slowly moving all my project to Python 3. It's pretty simple task with 2to3 app for "small" project. You can sometime get some conflict with old std libs or issues with unicode/string stream but nothing bad...

I guess it will be a bit more complicated to move mayavi and others related projects but it shouldn't be something too hard to do in a mid term time.

I don't want to talk for others but I think many people are waiting mayavi to move their projects to Python 3.

"Don't wait until Python 4 is released please..."

:-)

Cheers

Step 1: Changing the pipeline topology. [IN PROGRESS]

Step 2: Changing the pipeline metadata

Step 3: Update only the algorithms, and not a combination of data objects/algorithms.

Step 4: (VTK 6 only): Subclass only from vtkAlgorithm and use the RequestXXXX api

I am working to install Mayavi2 on my Windows 7 (64 Bit), but am not able to fully interact with the visualizer or TVTK window. They freeze immediately upon first opening. I have tried to install Mayavi2 using both the Enthought (64 Bit & 32 Bit) and Python(x,y) distributions with full system cleans before the installation to ensure that all Python materials are removed. Each installation allows me to interact with Python with no noticeable trouble and I am able to "import mayavi" to my shell. The problem comes when calling a mayavi function (e.g., mlab.plot3d) or simply running the Mayavi2 GUI. Immediately the window freezes and shows a (Not Responding) message. I have tried to install the package on another Windows 7 (64 Bit) machine with no problem. Thanks for the help. I am very interested to see if there is a machine-specific solution to my problem or what I might try to get around this window crash.

Here is my installation environment: Ubuntu 20.04 LTS on a ThinkPad P15 laptop And when I do pip install mayavi, I get stuck during the Building wheel process:

Python version is 3.8.10.

I'm unable to run the test suite (under nose) on macOS, with the latest master of Mayavi in a venv: the test suite hangs with no output.

Steps to reproduce: here are the commands I'm issuing, in a zsh shell on macOS 10.15.7 (Intel MacBook Pro). Here python3.9 is Python 3.9.7, installed via MacPorts.

python3.9 -m venv --clear ~/.venvs/mayavi
source ~/.venvs/mayavi/bin/activate
python -m pip install -e .
python -m pip install nose
python -m nose.core -v mayavi

Note: the python -m pip install -e . instruction also hangs intermittently (perhaps 1 run out of every 3), but succeeds often enough to allow me to get to the next step.

When the installation succeeds, the test run using nose hangs with no output other than a RuntimeWarning about nose.core being found in sys.modules prior to execution of nose.core. The hang can't be interrupted with a Ctrl-C, and top shows no CPU usage or memory growth in the associated process - IOW the hang resembles a deadlock of some kind. The Python process shows 7 OS-level threads; I'm not sure what's causing the extra threads in something that I'd expect to be single-threaded.

There's at least one obvious problem with my setup, which is that I know that the test suite expects some other packages to be present, and will fail without them. However, this still shouldn't be responsible for hanging the test run - we should have a better failure mode here.

I consider this sort of issue to be high priority to diagnose and fix: it makes development work much harder than it needs to be.

On my system mayavi 4.4.0 (and the previous version) will make the text3d disappear when the window is made fullscreen.

Procedure:

from mayavi import mlab
mlab.points3d(0, 0, 0, opacity=0.5)
mlab.text3d(0, 0, 0, 'A')
mlab.show()

After these commands a sphere and an A is displayed. Pressing the fullscreen button makes the text3d disappear from the scene. The Text3D object is still visible in the 'Mayavi pipline' window.

Hi all!

I want to embed a mayavi surface plot into a PyQt5 widget, like I did with matplotlib plots. Alas, I didn't find any working examples of such an embedding.

Is PyQt5 supported now?

The aim of this PR is to solicit feedback and merge this early for those who want to cut themselves on the bleeding edge.

This adds experimental Python3 support for Mayavi. To use it one requires a recent version of apptools and envisage (by recent I mean that these PRs should be merged https://github.com/enthought/apptools/pull/54 and https://github.com/enthought/envisage/pull/61 ).

It requires the master branch of pyface.

It will require the latest version of VTK from their git repository (https://gitlab.kitware.com/vtk/vtk) and a fresh build of VTK configured for Python3. I have not bothered with travis CI support at this point due to the complexity of doing that. These changes pass all current 2.7.x tests on travis so should be safe to merge.

Status and known issues

• The changes are compatible with Python 2.x and 3.x. I have tested on 2.7.x and 3.4.x.
• All the tvtk tests pass.
• There are a couple of random failures in the mayavi tests. These may be version specific issues but need more investigation.
• The integration tests mostly run fine but blocks on exit (with PyQt) so if you run one of them you need to kill it to run the next. This can be investigated later.
• mlab works quite well.
• The mayavi2 application itself has a few issues that seem pyface related and will be investigated later, notably the persistence of the workbench perspectives are not pickled/unpickled properly..

I have tested this with VTK 6.2 and 6.3 on Ubuntu 12, and VTK 6.3 on OSX 10.11

Things seem to work but since this is a fundamental change, I would prefer sitting on it for a bit longer. Review and comments are very much appreciated.

Most of these changes are tested by the existing TVTK test for initialising all classes, but I think I could also add more tests to make it more robust.

To compare the bahaviour, try the following with the master branch and with this one:

from tvtk.api import tvtk
obj = tvtk.ViewTheme()
obj.configure_traits()

Closes #1049

@opoplawski can you see if this fixes your build hang on Fedora 34? It at least "fixes" the hang for me on Windows. Plotting still doesn't work there (mlab.test_plot3d()) despite pyvistaqt.BackgroundPlotter working okay, so there is more to fix. But this might already be good enough progress in that it will prevent total pip install hangs for people using the VTK pre wheels. (They'll have a problem later when they try to actually plot, but that's at least easier to diagnose than an empty build log that took an hour of CI time).

This is a bit nightmarish to figure out, but I'm about halfway through adding exceptions for the objects. There is probably an automated way to do it, might be worth figuring that out...

Closes #908.

I already posted a comment in the issue #281 thread, but since it is closed, I am opening a new issue.

As originally described, and as now occurs again:

'On a slower system, like a Linux Virtual Machine, I observed an occasional traceback when pressing a key (say, z) and rotating the scene with the mouse: [...] TypeError: SetEventInformationFlipY argument 5: a string of length 1 is required'

I found that the original fix for #281 needs to be modified slightly in the source code for QVTKRenderWindowInteractor.py:

if ev.isAutoRepeat():
# key = key[0]
key = bytes(key[0])

(apologies I am not a formatting wiz here)

Hi, I have a scalar 3D cube where I want to add opacity to some slices but it is not possible with volume_slice and image plane widget. The only current solution was to use scalar cut plane (where opacity works). Is it possible for me to add opacity via pipeline to image plane widget? Thanks in advance!

Hello! My environment is ubuntu18.04, python 3.7.When I use mayavi to visualize the point cloud, the following error appears: ImportError: Could not import backend for trainsui Make sure you have a suitable UI toolkit like PyQt/PySide or wxPython installed.

But I have installed the required dependencies.

I also defined the path of environment variables according to your suggestions to others:

But this problem still exists. It's been bothering me for a long time. It's crazy. Could you help me?Thank you very much,sorry for your inconvenience.

Environment:

os:Ubuntu 22.04
conda: 22.9.0
python: 3.9.13

when I planned to install mayavi by conda, it was sticked there:

What's the problem, and how to resolve it?

Collecting configobj Using cached configobj-5.0.6.tar.gz (33 kB) Preparing metadata (setup.py) ... error error: subprocess-exited-with-error

× python setup.py egg_info did not run successfully. │ exit code: 1 ╰─> [6 lines of output] Traceback (most recent call last): File "", line 36, in File "", line 34, in File "C:\temp\pip-install-29s4msxx\configobj_9b92c695733840439ec2e6a1e365cf8d\setup.py", line 17, in from _version import version ModuleNotFoundError: No module named '_version' [end of output]