Error with ``QVTKRenderWindowInteractor‘’

[nil-is-lin]

I got the error when test the following code
`using PyCall

sys = pyimport("sys")
pygui(:qt)
PyCall.eventloops[:qt] = PyCall.qt_eventloop("PySide2", 50e-3)
QtWidgets = pyimport("PySide2.QtWidgets")
QtCore = pyimport("PySide2.QtCore")
QtGui = pyimport("PySide2.QtGui")
qvtk_window = pyimport("vtk.qt.QVTKRenderWindowInteractor")
vtk = pyimport("vtk")
pv = pyimport("pyvista")

app = QtWidgets.QApplication(sys.argv)
main_window = QtWidgets.QMainWindow()

frame = QtWidgets.QFrame()
vtk_widget = qvtk_window.QVTKRenderWindowInteractor(frame)
the last line(vtk_widget = qvtk_window.QVTKRenderWindowInteractor(frame)) throw ERROR: PyError ($(Expr(:escape, :(ccall(#= C:\Users***.julia\packages\PyCall\zqDXB\src\pyfncall.jl:43 =# @pysym(:PyObject_Call), PyPtr, (PyPtr, PyPtr, PyPtr), o, pyargsptr, kw))))) <class 'TypeError'>
TypeError("QWidget(parent: QWidget = None, flags: Union[Qt.WindowFlags, Qt.WindowType] = Qt.WindowFlags()): argument 1 has unexpected type 'PySide2.QtWidgets.QFrame'")
File "D:\Python\Python37\lib\site-packages\vtkmodules\qt\QVTKRenderWindowInteractor.py", line 260, in init
QWidget.init(self, parent, wflags | Qt.MSWindowsOwnDC)However, the origin python code is work well,import sys
import vtk
from PySide2 import QtCore, QtGui, QtWidgets
from vtk.qt.QVTKRenderWindowInteractor import QVTKRenderWindowInteractor

app = QtWidgets.QApplication(sys.argv)

window = QtWidgets.QMainWindow()
frame = QtWidgets.QFrame()
vl = QtWidgets.QVBoxLayout()
vtkWidget = QVTKRenderWindowInteractor(frame)
vl.addWidget(vtkWidget)
ren = vtk.vtkRenderer()
vtkWidget.GetRenderWindow().AddRenderer(ren)
iren = vtkWidget.GetRenderWindow().GetInteractor()

Create source

source = vtk.vtkSphereSource()
source.SetCenter(0, 0, 0)
source.SetRadius(5.0)

Create a mapper

mapper = vtk.vtkPolyDataMapper()
mapper.SetInputConnection(source.GetOutputPort())

Create an actor

actor = vtk.vtkActor()
actor.SetMapper(mapper)

ren.AddActor(actor)

ren.ResetCamera()

frame.setLayout(vl)
window.setCentralWidget(frame)

window.show()
iren.Initialize()

sys.exit(app.exec_())
`

The Code running environment is: Win 10 professional, Vtk version is 9.0.1.
Thanks by advance for any help :)

[nil-is-lin]

I just found that it works if I comment
pygui(:qt) PyCall.eventloops[:qt] = PyCall.qt_eventloop("PySide2", 50e-3)
So should I comment them?

[stevengj]

If you are running your own event loop, you shouldn't call pygui at all.