PySide2 support

[markeastwood82]

I have seen that this issue has had numerous tickets before, but they didn't help and are all currently closed.

I am running:
python 3.7.6 (64 bit)
vtk 8.2.0
pyvista 0.24.1
pyside2 5.13.2

All installed by Anaconda3 2020.02. I've not modified anything besides creating an environment to install the required components (including pyside2). I can run PyVista fine without Qt.

Trying out the code from issue #44 I get the following error message

Traceback (most recent call last):
  File "C:\Users\User\Documents\Mark\Code\pyvista-muck\inaqt.py", line 56, in <module>
    window = MainWindow()
  File "C:\Users\User\Documents\Mark\Code\pyvista-muck\inaqt.py", line 24, in __init__
    self.vtk_widget = pv.QtInteractor(self.frame)
  File "C:\Users\User\anaconda3\envs\MPos\lib\site-packages\pyvista\plotting\qt_plotting.py", line 449, in __init__
    self.render_timer = QTimer(parent=parent)
TypeError: QTimer(parent: QObject = None): argument 'parent' has unexpected type 'PySide2.QtWidgets.QFrame'

Is there any trick needed in order to get that code to work?

[GuillaumeFavelier]

I'm sorry, I would love to help with this but I can't even manage to make a hello world example work with PySide2 on my config:

# Import PySide2 classes
import sys
from PySide2 import QtCore, QtWidgets

# Create a Qt application
app = QtWidgets.QApplication(sys.argv)

# Create a Window
mywindow = QtWidgets.QWidget()
mywindow.resize(320, 240)
mywindow.setWindowTitle('Hello World!')

# Create a label and display it all together
mylabel = QtWidgets.QLabel(mywindow)
mylabel.setText('Hello World!')
mylabel.setGeometry(QtCore.QRect(200, 200, 200, 200))

mywindow.show()

# Enter Qt application main loop
sys.exit(app.exec_())

I got this error instead:

ImportError: /usr/lib/libgssapi_krb5.so.2: undefined symbol: k5_externalize_context, version krb5_3_MIT