PySide to PySide2

Coding
#1

Hi, dev,

I have my UI from QT Designer and I run it with a code in PyCharm successfully:

from PySide.QtGui import *

from UI import createScene_Main


class CreateScene(QWidget, createScene_Main.Ui_CreateScene):
    def __init__(self):
        super(CreateScene, self).__init__()

        # SETUP UI
        self.setupUi(self)

app = QApplication([])
CS = CreateScene()
CS.show()
app.exec_()

But if I run this code in Houdini (changing PySide to PySide2 in this code and in UI file as well) I get an error: NameError: name 'QWidget' is not defined. How can I fix it?

Also. I cant Install PySide2 on my Windows PC. Running in command prompt pip install PySide2 raises an error:
Could not find a version that satisfies the requirement PySide2 (from versions: ) No matching distribution found for PySide2

#2

long story short - PySide and PySide2 are not interchangable - use this to facilitate that:

#3

Thanks, leocov! Sorry, I was not clear enough, I don`t need to interchange anything, I need to launch a UI created in QT Designer with PySide2, if its possible. Do I need to use QT Designer shipped with PySide2 for that? If so, then I suppose I need to install PySide2 and this is one of the issues I mention.

#4

Sorry I miss-read that. I don’t use QtDesigner myself, so i don’t know if your ui files will be cross compatible.

The problem with the code you posted (that launches your ui?) is still that you are trying to instantiate a QWidget and that class does not exist in PySide - you can rewrite that code using Qt.py to get around this if you need to support PySide2 and PySide.

#5

Any thoughts why I cant install PySide2 with pip?

#6

What version of python?
Currently pyside2 only supports python3.5+

#7

Got it. I thought it could work with Python27.

#8

I think the limiting factor is that the default compilers it targets aren’t supported for python2.7.
But if you do something similar to Autodesk and compile your own version of python27 with that compiler, you should also be able to build a version of PySide2 for it.

But this is a whole lot of work, and you’d have to distribute you’re custom version of python to any users of your tool.

#9

Yeah, I am trying to keep thing simple. I found the way to load QTDesigner 2.7 UI files in Houdini, so for now I am good.

Thanks everybody!

#10

This is something I had to deal with quite a bit when I started out with Maya UI.

The differences don’t seem to be very well documented but all you really need to understand is that when Qt updated from Qt4 to Qt5, a whole bunch of stuff (mostly widgets) was moved from QtGui into the (new as of Qt5) QtWidgets package. PySide is a binding to Qt4, whereas PySide2 is a binding to Qt5.

For your original example, all you have to do is change the import to this

from PySide2.QtWidgets import *

or if you want to be prepared for all cases…

from PySide2.QtWidgets import *
from PySide2.QtGui import *
from PySide2.QtCore import *

As leocov mentioned, you can avoid the compatibility problem by using Qt.py, which basically just tries to import every possible binding and sends you back the one that is successful, so it’ll be compatible for both PySide and PySide2. I would recommend using it, especially if you want to hand your code off to someone else and be sure it will work on older versions of Houdini.

One last note on using Qt.py… It’s set up to be used like a Qt5 binding, so it includes QtWidgets. SO, for whatever version of designer you used, it’ll be compatible if you use

from Qt.QtWidgets import *
from Qt.QtGui import *
from Qt.QtCore import *

Hope this helps!

2 Likes
#11

You can find PySide2 wheels here, which you can download and install with pip:
http://download.qt.io/snapshots/ci/pyside/5.9/latest/pyside2/

And there are versions of PySide2 for Python 2.7, too.

#12

Good find though, those are for Qt 5.9, the latest is 5.11, which is when they appeared to drop python 2. It appears that PyQt5 also dropped support for python2 with the 5.11 version.

#13

In the parent directories you can find the 5.11 wheels:
http://download.qt.io/snapshots/ci/pyside/5.11/latest/pyside2/

It looks like they dropped Python 2 on Windows only, but the first 5.11 versions have a Windows Python 2 version:
PySide2-5.11.0a1.dev1528379875-5.11.1-cp27-cp27m-win_amd64.whl

#14

I downloaded wheel for windows, trying to install and get error:

PySide2-5.9.0a1.dev1528391040-5.9.6-cp35.cp36-none-win_amd64.whl is not a supported wheel on this platform.

#15

What version of python?

cp35.cp36 in the name PySide2-5.9.0a1.dev1528391040-5.9.6-cp35.cp36-none-win_amd64.whl seems to imply cPython 3.5 / 3.6.

1 Like
#16

To install the PySide2 version closest to 3ds Max 2019, you can use use this command to do it with pip:

pip install --index-url=http://download.qt.io/snapshots/ci/pyside/5.6/latest/ pyside2 --trusted-host download.qt.io

See notice here

#17

Ended up with this solution: https://github.com/kiryha/Houdini/wiki/python-for-artists#run-tool-from-the-shell

#18

Hi, i don’t know if here is the right place to post, but i have an issue with an old maya plugin called bSkinSaver which uses pySide in order to run and as i understand now maya has pySide 2.
So i am in a situation that i really need this script but i don’t know what to do.
I have tried many things(i am not an expert of python) replacing Pyside with Pyside2 shiboken with shiboken 2 QtCore and QtGui with QtWidgets but still nothing happens. I am able at the moment to run it without an error but when i am calling the script errors pops, such as # Error: AttributeError: file <maya console> line 43: 'module' object has no attribute 'WindowStaysOnTopHint' #

Here is the original script:

"""
=====================================================================
    Tool for saving and loading skinWeights in Maya

    (c) 2013 - 2015 by Thomas Bittner
    [email protected]

    source the file and then run: showUI()


=====================================================================
    
"""




import maya.OpenMayaMPx as OpenMayaMPx
import maya.OpenMaya as OpenMaya
import maya.OpenMayaAnim as OpenMayaAnim
import maya.mel
import sys
import maya.cmds as cmds
import maya.OpenMayaUI as mui
from PySide import QtCore, QtGui
import shiboken



def showUI():
    global mainWin
    mainWin = bSkinSaverUI()
    mainWin.show()


def getMayaWindow():
    ptr = mui.MQtUtil.mainWindow()
    return shiboken.wrapInstance(long(ptr), QtGui.QWidget)


class bSkinSaverUI(QtGui.QDialog):
    def __init__(self, parent=getMayaWindow()):
        super(bSkinSaverUI, self).__init__(parent, QtCore.Qt.WindowStaysOnTopHint)

        tab_widget = QtGui.QTabWidget()
        objectsTab = QtGui.QWidget()
        verticesTab = QtGui.QWidget()
        
        tab_widget.addTab(objectsTab, "Objects")
        tab_widget.addTab(verticesTab, "Vertices")
        self.descLabel = QtGui.QLabel("(C) 2015 by Thomas Bittner", parent=self)       
        self.setWindowTitle('bSkinSaver 1.0')
        
        self.objectsFileLine = QtGui.QLineEdit('', parent=self)
        self.selectObjectsFileButton = QtGui.QPushButton("Set File", parent=self)
        self.saveObjectsButton = QtGui.QPushButton("Save Weights from selected Objects", parent=self)
        self.loadObjectsButton = QtGui.QPushButton("Load", parent=self)
        self.loadObjectsSelectionButton = QtGui.QPushButton("Load to Selected Object", parent=self)

        objectsLayout = QtGui.QVBoxLayout(objectsTab)
        objectsLayout.setAlignment(QtCore.Qt.AlignTop)
        objectsLayout.setSpacing(3)
        objectsFileLayout = QtGui.QBoxLayout(QtGui.QBoxLayout.LeftToRight)
        objectsFileLayout.addWidget(self.objectsFileLine)
        objectsFileLayout.addWidget(self.selectObjectsFileButton)    
        objectsLayout.addLayout(objectsFileLayout)
        
        objectsButtonLayout = QtGui.QBoxLayout(QtGui.QBoxLayout.TopToBottom)
        objectsButtonLayout.setSpacing(0)
        objectsButtonLayout.addWidget(self.saveObjectsButton)
        objectsButtonLayout.addWidget(self.loadObjectsButton)
        objectsButtonLayout.addWidget(self.loadObjectsSelectionButton)

        objectsLayout.addLayout(objectsButtonLayout)
        
        self.verticesFileLine = QtGui.QLineEdit('', parent=self)
        self.selectVerticesFileButton = QtGui.QPushButton("Set File", parent=self)
        self.saveVerticesButton = QtGui.QPushButton("Save Weights from selected Vertices", parent=self)
        self.loadVerticesButton = QtGui.QPushButton("Load onto selected Object", parent=self)
        
        verticesLayout = QtGui.QVBoxLayout(verticesTab)
        verticesLayout.setAlignment(QtCore.Qt.AlignTop)
        verticesLayout.setSpacing(3)
        verticesFileLayout = QtGui.QBoxLayout(QtGui.QBoxLayout.LeftToRight)
        verticesFileLayout.addWidget(self.verticesFileLine)
        verticesFileLayout.addWidget(self.selectVerticesFileButton)        
        verticesLayout.addLayout(verticesFileLayout)
        
        verticesButtonLayout = QtGui.QBoxLayout(QtGui.QBoxLayout.TopToBottom)
        verticesButtonLayout.setSpacing(0)
        verticesButtonLayout.addWidget(self.saveVerticesButton)
        verticesButtonLayout.addWidget(self.loadVerticesButton)
        verticesLayout.addLayout(verticesButtonLayout)
        
        
        self.layout = QtGui.QBoxLayout(QtGui.QBoxLayout.TopToBottom, self) 
        self.layout.addWidget(tab_widget)
        self.layout.addWidget(self.descLabel)
        self.resize(400, 10)
        
        #select files
        self.connect(self.selectObjectsFileButton, QtCore.SIGNAL("clicked()"), self.selectObjectsFile)        
        self.connect(self.selectVerticesFileButton, QtCore.SIGNAL("clicked()"), self.selectVerticesFile)        

        self.connect(self.saveObjectsButton, QtCore.SIGNAL("clicked()"), self.saveObjects)        
        self.connect(self.loadObjectsButton, QtCore.SIGNAL("clicked()"), self.loadObjects)                        
        self.connect(self.loadObjectsSelectionButton, QtCore.SIGNAL("clicked()"), self.loadObjectsSelection)   
                            
        self.connect(self.saveVerticesButton, QtCore.SIGNAL("clicked()"), self.saveVertices)        
        self.connect(self.loadVerticesButton, QtCore.SIGNAL("clicked()"), self.loadVertices)                        
                
    def selectObjectsFile(self):
        fileResult = cmds.fileDialog2()
        if fileResult != None:
            self.objectsFileLine.setText(fileResult[0])

    def selectVerticesFile(self):
        fileResult = cmds.fileDialog2()
        if fileResult != None:       
            self.verticesFileLine.setText(fileResult[0])

    
    def loadObjects(self):
        bLoadSkinValues (False, str(self.objectsFileLine.text()))
        
    def loadObjectsSelection(self):
        bLoadSkinValues (True, str(self.objectsFileLine.text()))
        
    def saveObjects(self):
        bSaveSkinValues(str(self.objectsFileLine.text()))
         
    def loadVertices(self):
        bLoadVertexSkinValues (str(self.verticesFileLine.text()))
        
    def saveVertices(self):   
        bSaveVertexSkinValues(str(self.verticesFileLine.text()))

    

bSkinPath = OpenMaya.MDagPath()
def bFindSkinCluster(objectName):    
    it = OpenMaya.MItDependencyNodes(OpenMaya.MFn.kSkinClusterFilter)
    while not it.isDone():
        fnSkinCluster = OpenMayaAnim.MFnSkinCluster(it.item())
        fnSkinCluster.getPathAtIndex(0,bSkinPath)
                
        if OpenMaya.MFnDagNode(bSkinPath.node()).partialPathName() == objectName or OpenMaya.MFnDagNode(OpenMaya.MFnDagNode(bSkinPath.node()).parent(0)).partialPathName() == objectName:
            return it.item()
        it.next()
    return False



def bLoadVertexSkinValues(inputFile):

    line = ''
    joints = []
    weights = []
    splittedStrings = []
    splittedWeights = []
    weightDoubles = OpenMaya.MDoubleArray()
    selectionList = OpenMaya.MSelectionList()
    vertexCount = 0;

    OpenMaya.MGlobal.getActiveSelectionList( selectionList );
    node = OpenMaya.MDagPath()
    component = OpenMaya.MObject()
    selectionList.getDagPath( 0, node, component );

    if not node.hasFn(OpenMaya.MFn.kTransform):
        print 'select a skinned object'



    NewTransform = OpenMaya.MFnTransform (node)
    if not NewTransform.childCount() or not NewTransform.child(0).hasFn(OpenMaya.MFn.kMesh):
        print 'select a skinned object..'

    mesh = NewTransform.child(0);
    objectName = OpenMaya.MFnDagNode(mesh).name()
    skinCluster = bFindSkinCluster(objectName)
    if not skinCluster.hasFn(OpenMaya.MFn.kSkinClusterFilter):
        print 'select a skinned object'

    fnSkinCluster = OpenMayaAnim.MFnSkinCluster(skinCluster)
    input = open(inputFile, 'r')

    joints = []
    weightLines = []
    filePosition = 0
    while True:
        line = input.readline().strip()
        if not line:
            break

        if filePosition == 0:
            vertexCount = int(line)
            filePosition = 1
        elif filePosition == 1:
            if not line.startswith("========"):
                joints.append(line)
            else:
                filePosition = 2;        
        elif filePosition == 2:
            weightLines.append(line)

    if OpenMaya.MItGeometry(node).count() != vertexCount:
        print "vertex counts don't match, result might be bad"



    # joints..
    influenceArray = OpenMaya.MDagPathArray()
    influenceStringArray = []
    influenceMapArray = OpenMaya.MIntArray()
    jointsMapArray = OpenMaya.MIntArray()

    infCount = fnSkinCluster.influenceObjects(influenceArray)
    for i in range(infCount):
        influenceStringArray.append(OpenMaya.MFnDagNode(influenceArray[i]).name())      
        influenceMapArray.append(-1)
        for k in range(len(joints)):
            if influenceStringArray[i] == joints[k]:
                influenceMapArray[i] = k

    for i in range(len(joints)):
        jointsMapArray.append(-1);

    allInfluencesInScene = True
    influenceInScene = False
    for i in range(len(joints)):
        influenceInScene = False
        for k in range(len(influenceStringArray)):
            if influenceStringArray[k] == joints[i]:
                influenceInScene = True
                jointsMapArray[i] = k

        if not influenceInScene:
            allInfluencesInScene = False
            print joints[i], ' is missing in the skinCluster'

    if not allInfluencesInScene:
        print 'There are influences missing'
        return

    extraInfluencesCount = 0

    for i in range(len(influenceStringArray)):
        jointInInfluences = False
        for k in range(len(joints)):
            if joints[k] == influenceStringArray[i]:
                jointInInfluences = True
        if not jointInInfluences:
            jointsMapArray.append(i)
            extraInfluencesCount += 1

    #load points
    fnVtxComp = OpenMaya.MFnSingleIndexedComponent()
    vtxComponents = OpenMaya.MObject()
    vtxComponents = fnVtxComp.create( OpenMaya.MFn.kMeshVertComponent )

    for i in range(len(weightLines)):
        splittedStrings = weightLines[i].split(':');
        if len(splittedStrings) > 1:
            fnVtxComp.addElement(int(splittedStrings[0]))
            splittedWeights = splittedStrings[1].split(' ')
            for k in range(len(splittedWeights)):
                weightDoubles.append(float(splittedWeights[k]))

            weightDoubles += [0] * extraInfluencesCount


    #SET WEIGHTS 
    fnSkinCluster.setWeights(bSkinPath, vtxComponents, jointsMapArray, weightDoubles, 0)

    # select the vertices
    pointSelectionList = OpenMaya.MSelectionList()
    pointSelectionList.add(OpenMaya.MDagPath(node),vtxComponents);
    OpenMaya.MGlobal.setActiveSelectionList(pointSelectionList);



def bSaveVertexSkinValues(inputFile):
    print 'saving Vertex skinWeights.. '

    selection = OpenMaya.MSelectionList()
    OpenMaya.MGlobal.getActiveSelectionList( selection );
    iterate = OpenMaya.MItSelectionList(selection);
    while not iterate.isDone():
        dagPath = OpenMaya.MDagPath()
        component = OpenMaya.MObject();
        iterate.getDagPath(dagPath, component);
        skinCluster = bFindSkinCluster(OpenMaya.MFnDagNode(dagPath).partialPathName())
        fnSkinCluster = OpenMayaAnim.MFnSkinCluster(skinCluster);
        iterate.next()

        if skinCluster.hasFn(OpenMaya.MFn.kSkinClusterFilter):
            output = open(inputFile, 'w')
            output.write(str(OpenMaya.MItGeometry(bSkinPath).count()) + '\n')

            fnVtxComp = OpenMaya.MFnSingleIndexedComponent()
            vtxComponents = OpenMaya.MObject();
            vtxComponents = fnVtxComp.create( OpenMaya.MFn.kMeshVertComponent );

            WeightArray = OpenMaya.MFloatArray()
            meshIter = OpenMaya.MItMeshVertex ( dagPath, component)
            while not meshIter.isDone():
                fnVtxComp.addElement( meshIter.index());
                meshIter.next()

            vertexCount = meshIter.count();
            scriptUtil = OpenMaya.MScriptUtil()
            infCountPtr = scriptUtil.asUintPtr()     
            fnSkinCluster.getWeights(bSkinPath, vtxComponents, WeightArray, infCountPtr)
            infCount = OpenMaya.MScriptUtil.getUint(infCountPtr)

            weightCheckArray = []
            for i in range(infCount):
                weightCheckArray.append(False)

            for i in range(vertexCount):
                for k in range(infCount):
                    if not weightCheckArray[k] and WeightArray[((i * infCount) + k)]:
                        weightCheckArray[k] = True

            #joints.. 
            InfluentsArray = OpenMaya.MDagPathArray()
            fnSkinCluster.influenceObjects(InfluentsArray);
            for i in range(infCount):
                if (weightCheckArray[i]):
                    output.write(OpenMaya.MFnDagNode(InfluentsArray[i]).name() + '\n')

            output.write('============\n')

            counter = 0;
            weightArrayString = []
            meshIter = OpenMaya.MItMeshVertex (dagPath, component)
            while not meshIter.isDone():
                weightArrayString = str(meshIter.index()) + ':'

                for k in range(infCount):
                    if weightCheckArray[k] == True:
                        weightArrayString += str(WeightArray[(counter * infCount) + k]) + ' '

                output.write(weightArrayString + '\n')
                counter += 1
                meshIter.next()

            output.close()
            iterate.next()




def bSaveSkinValues(inputFile):

    output = open(inputFile, 'w')

    selection = OpenMaya.MSelectionList()
    OpenMaya.MGlobal.getActiveSelectionList(selection)

    iterate = OpenMaya.MItSelectionList(selection)

    while not iterate.isDone():
        node = OpenMaya.MDagPath()
        component = OpenMaya.MObject()
        iterate.getDagPath (node, component)
        if not node.hasFn(OpenMaya.MFn.kTransform):
            print OpenMaya.MFnDagNode(node).name() + ' is not a Transform node (need to select transform node of polyMesh)'
        else:
            objectName = OpenMaya.MFnDagNode(node).name()
            newTransform = OpenMaya.MFnTransform(node)
            for childIndex in range(newTransform.childCount()):
                childObject = newTransform.child(childIndex)
                if childObject.hasFn(OpenMaya.MFn.kMesh) or childObject.hasFn(OpenMaya.MFn.kNurbsSurface) or childObject.hasFn(OpenMaya.MFn.kCurve):
                    skinCluster = bFindSkinCluster(OpenMaya.MFnDagNode(childObject).partialPathName())
                    if skinCluster is not False:
                        bSkinPath = OpenMaya.MDagPath()
                        fnSkinCluster = OpenMayaAnim.MFnSkinCluster(skinCluster)
                        fnSkinCluster.getPathAtIndex(0,bSkinPath)
                        influenceArray = OpenMaya.MDagPathArray()
                        fnSkinCluster.influenceObjects(influenceArray)
                        influentsCount = influenceArray.length()
                        #output.write(bSkinPath.partialPathName() + '\n')
                        output.write(objectName + '\n')

                        for k in range(influentsCount):
                            jointTokens = str(influenceArray[k].fullPathName()).split('|')
                            jointTokens = jointTokens[len(jointTokens)-1].split(':')
                            output.write(jointTokens[len(jointTokens)-1] + '\n')

                        output.write('============\n')

                        vertexIter = OpenMaya.MItGeometry(bSkinPath)

                        saveString = ''
                        counterValue = 0
                        while not vertexIter.isDone():
                            counterValue = counterValue + 1
                            vertex = vertexIter.component()

                            scriptUtil = OpenMaya.MScriptUtil()
                            infCountPtr = scriptUtil.asUintPtr()     
                            vtxComponents = OpenMaya.MObject()     
                            weightArray = OpenMaya.MDoubleArray()  

                            fnSkinCluster.getWeights(bSkinPath, vertex, weightArray, infCountPtr)

                            saveString = ''

                            for j in range(OpenMaya.MScriptUtil.getUint(infCountPtr)):
                                saveString += str(weightArray[j])
                                saveString += ' '

                            output.write(saveString + '\n')

                            vertexIter.next()
                        output.write('\n')


        iterate.next()

    output.close()
    print "done saving weights"





def bSkinObject(objectName, joints, weights):

    if not cmds.objExists(objectName):
        print objectName, " doesn't exist - skipping. "
        return
    
    allInfluencesInScene = True;
    jointsCheck = [] 
    for i in range(len(joints)):
        jointsCheck = joints[i]

    sceneJointTokens = []
    fileJointTokens = []

    it = OpenMaya.MItDependencyNodes ( OpenMaya.MFn.kJoint);
    # quick check:
    for jointIndex in range(len(joints)):
        jointHere = False;
        it = OpenMaya.MItDependencyNodes ( OpenMaya.MFn.kJoint)
        while not it.isDone():                
            sceneJointTokens = str(OpenMaya.MFnDagNode(it.item()).fullPathName()).split('|')
            if str(joints[jointIndex]) == str(sceneJointTokens[len(sceneJointTokens) - 1]):
                jointHere = True;

            it.next()

        if not jointHere:
            allInfluencesInScene = False;
            print 'missing influence: ', joints[jointIndex]



    if not allInfluencesInScene:
        print objectName, " can't be skinned because of missing influences."
        return

    #maya.mel.eval("undoInfo -st 0")

    
    if type(bFindSkinCluster(objectName)) != type(True):
        maya.mel.eval("DetachSkin " + objectName)

    cmd = "select "
    for i in range(len(joints)):
        cmd += " " + joints[i]

    cmd += " " + objectName
    maya.mel.eval(cmd)

    maya.mel.eval("skinCluster -tsb -mi 10");
    maya.mel.eval("select `listRelatives -p " + objectName + "`");
    maya.mel.eval("refresh")
    #maya.mel.eval("undoInfo -st 1")

    skinCluster = bFindSkinCluster(objectName)
    fnSkinCluster = OpenMayaAnim.MFnSkinCluster(skinCluster)
    InfluentsArray = OpenMaya.MDagPathArray()
    fnSkinCluster.influenceObjects(InfluentsArray)

    bSkinPath = OpenMaya.MDagPath()
    fnSkinCluster.getPathAtIndex(fnSkinCluster.indexForOutputConnection(0),bSkinPath)

    weightStrings = []
    vertexIter = OpenMaya.MItGeometry (bSkinPath)

    weightDoubles = OpenMaya.MDoubleArray()


    singleIndexed = True;
    vtxComponents = OpenMaya.MObject()
    fnVtxComp = OpenMaya.MFnSingleIndexedComponent()
    fnVtxCompDouble = OpenMaya.MFnDoubleIndexedComponent()

    
    if bSkinPath.node().apiType() == OpenMaya.MFn.kMesh:
        vtxComponents = fnVtxComp.create( OpenMaya.MFn.kMeshVertComponent )
    elif bSkinPath.node().apiType() == OpenMaya.MFn.kNurbsSurface:
        singleIndexed = False
        vtxComponents = fnVtxCompDouble.create( OpenMaya.MFn.kSurfaceCVComponent )
    elif bSkinPath.node().apiType() == OpenMaya.MFn.kNurbsCurve:
        vtxComponents = fnVtxComp.create( OpenMaya.MFn.kCurveCVComponent )
   
    #mapping joint-indices
    influenceIndices = OpenMaya.MIntArray()
    checkInfluences = []

    for k in range(InfluentsArray.length()):
        checkInfluences.append(0)
    for i in range(len(joints)):
        influenceIndices.append(-1)

    for i in range(len(joints)):
        fileJointTokens = joints[i].split('|')

        for k in range(InfluentsArray.length()):

            sceneJointTokens = str(OpenMaya.MFnDagNode(InfluentsArray[k]).fullPathName()).split('|')
            if fileJointTokens[len(fileJointTokens) - 1] == sceneJointTokens[len(sceneJointTokens) - 1]:  # changed from joints
                influenceIndices[i] = k
                checkInfluences[k] = 1        

    counterValue = 0;
    if not singleIndexed:
        currentU = 0
        currentV = 0

        cvsU = OpenMaya.MFnNurbsSurface(bSkinPath.node()).numCVsInU()
        cvsV = OpenMaya.MFnNurbsSurface(bSkinPath.node()).numCVsInV()
        formU = OpenMaya.MFnNurbsSurface(bSkinPath.node()).formInU()
        formV = OpenMaya.MFnNurbsSurface(bSkinPath.node()).formInV()
	
        if formU == 3:
            cvsU -= 3
        if formV == 3:
            cvsV -= 3
    
    
    vertexIter = OpenMaya.MItGeometry (bSkinPath)
    while not vertexIter.isDone():
        weightStrings = []
        if singleIndexed:
            fnVtxComp.addElement(counterValue)
        else:
            fnVtxCompDouble.addElement(currentU, currentV)
            currentV += 1;
            if currentV >= cvsV:
                currentV = 0
                currentU += 1

        weightStrings = weights[counterValue].split(' ');
        for i in range(len(weightStrings)):
            weightDoubles.append(float(weightStrings[i]))
        counterValue += 1
        vertexIter.next()

    #SET WEIGHTS 
    print "setting weights for  ", objectName
    fnSkinCluster.setWeights(bSkinPath, vtxComponents, influenceIndices,weightDoubles, 0)
    #Maya.mel.eval("skinPercent -normalize true " + fnSkinCluster.name() + " " + objectName)

    influenceIndices.clear();
    weightDoubles.clear();



def bLoadSkinValues(loadOnSelection, inputFile):
    joints = []
    weights = []
    PolygonObject = ""


    if loadOnSelection == True:
        selectionList = OpenMaya.MSelectionList()
        OpenMaya.MGlobal.getActiveSelectionList(selectionList)
        node = OpenMaya.MDagPath()
        component = OpenMaya.MObject()
        if selectionList.length():
            selectionList.getDagPath( 0, node, component )
            if node.hasFn(OpenMaya.MFn.kTransform):
	            NewTransform = OpenMaya.MFnTransform (node)
	            if NewTransform.childCount():
		            if NewTransform.child(0).hasFn(OpenMaya.MFn.kMesh):
			            PolygonObject = str(OpenMaya.MFnDagNode(NewTransform.child(0)).partialPathName())



    if loadOnSelection and len(PolygonObject) == 0:
        print "You need to select a polygon object"
        return

    input = open(inputFile, 'r')

    FilePosition = 0
    while True:
        line = input.readline()
        if not line:
            break

        line = line.strip()

        if FilePosition is not 0:
            if not line.startswith("============"):
                if FilePosition is 1:
                    joints.append(line) 
                elif FilePosition is 2:
                    if len(line) > 0:
                        weights.append(line)
                    else:
                        bSkinObject(PolygonObject, joints, weights)
                        PolygonObject = ""
                        joints = []
                        weights = []
                        FilePosition = 0
                        if loadOnSelection == True:
                            break

            else: # it's ========
                FilePosition = 2

        else: #FilePosition is 0
            if not loadOnSelection:
                PolygonObject = line
            FilePosition = 1;
            
            if cmds.objExists(PolygonObject):
                maya.mel.eval("select " + PolygonObject)
                maya.mel.eval("refresh")
#19

And here is the modified version:

"""
=====================================================================
    Tool for saving and loading skinWeights in Maya

    (c) 2013 - 2015 by Thomas Bittner
    [email protected]

    source the file and then run: showUI()


=====================================================================
    
"""




import maya.OpenMayaMPx as OpenMayaMPx
import maya.OpenMaya as OpenMaya
import maya.OpenMayaAnim as OpenMayaAnim
import maya.mel
import sys
import maya.cmds as cmds
import maya.OpenMayaUI as mui
from PySide2 import QtWidgets
import shiboken2



def showUI():
    global mainWin
    mainWin = bSkinSaverUI()
    mainWin.show()


def getMayaWindow():
    ptr = mui.MQtUtil.mainWindow()
    return shiboken2.wrapInstance(long(ptr), QtWidgets.QWidget)


class bSkinSaverUI(QtWidgets.QDialog):
    def __init__(self, parent=getMayaWindow()):
        super(bSkinSaverUI, self).__init__(parent, QtWidgets.WindowStaysOnTopHint)

        tab_widget = QtWidgets.QTabWidget()
        objectsTab = QtWidgets.QWidget()
        verticesTab = QtWidgets.QWidget()
        
        tab_widget.addTab(objectsTab, "Objects")
        tab_widget.addTab(verticesTab, "Vertices")
        self.descLabel = QtWidgets.QLabel("(C) 2015 by Thomas Bittner", parent=self)       
        self.setWindowTitle('bSkinSaver 1.0')
        
        self.objectsFileLine = QtWidgets.QLineEdit('', parent=self)
        self.selectObjectsFileButton = QtWidgets.QPushButton("Set File", parent=self)
        self.saveObjectsButton = QtWidgets.QPushButton("Save Weights from selected Objects", parent=self)
        self.loadObjectsButton = QtWidgets.QPushButton("Load", parent=self)
        self.loadObjectsSelectionButton = QtWidgets.QPushButton("Load to Selected Object", parent=self)

        objectsLayout = QtWidgets.QVBoxLayout(objectsTab)
        objectsLayout.setAlignment(QtWidgets.Qt.AlignTop)
        objectsLayout.setSpacing(3)
        objectsFileLayout = QtWidgets.QBoxLayout(QtWidgets.QBoxLayout.LeftToRight)
        objectsFileLayout.addWidget(self.objectsFileLine)
        objectsFileLayout.addWidget(self.selectObjectsFileButton)    
        objectsLayout.addLayout(objectsFileLayout)
        
        objectsButtonLayout = QtWidgets.QBoxLayout(QtWidgets.QBoxLayout.TopToBottom)
        objectsButtonLayout.setSpacing(0)
        objectsButtonLayout.addWidget(self.saveObjectsButton)
        objectsButtonLayout.addWidget(self.loadObjectsButton)
        objectsButtonLayout.addWidget(self.loadObjectsSelectionButton)

        objectsLayout.addLayout(objectsButtonLayout)
        
        self.verticesFileLine = QtWidgets.QLineEdit('', parent=self)
        self.selectVerticesFileButton = QtWidgets.QPushButton("Set File", parent=self)
        self.saveVerticesButton = QtWidgets.QPushButton("Save Weights from selected Vertices", parent=self)
        self.loadVerticesButton = QtWidgets.QPushButton("Load onto selected Object", parent=self)
        
        verticesLayout = QtWidgets.QVBoxLayout(verticesTab)
        verticesLayout.setAlignment(QtWidgets.Qt.AlignTop)
        verticesLayout.setSpacing(3)
        verticesFileLayout = QtWidgets.QBoxLayout(QtWidgets.QBoxLayout.LeftToRight)
        verticesFileLayout.addWidget(self.verticesFileLine)
        verticesFileLayout.addWidget(self.selectVerticesFileButton)        
        verticesLayout.addLayout(verticesFileLayout)
        
        verticesButtonLayout = QtWidgets.QBoxLayout(QtWidgets.QBoxLayout.TopToBottom)
        verticesButtonLayout.setSpacing(0)
        verticesButtonLayout.addWidget(self.saveVerticesButton)
        verticesButtonLayout.addWidget(self.loadVerticesButton)
        verticesLayout.addLayout(verticesButtonLayout)
        
        
        self.layout = QtWidgets.QBoxLayout(QtWidgets.QBoxLayout.TopToBottom, self) 
        self.layout.addWidget(tab_widget)
        self.layout.addWidget(self.descLabel)
        self.resize(400, 10)
        
        #select files
        self.connect(self.selectObjectsFileButton, QtWidgets.SIGNAL("clicked()"), self.selectObjectsFile)        
        self.connect(self.selectVerticesFileButton, QtWidgets.SIGNAL("clicked()"), self.selectVerticesFile)        

        self.connect(self.saveObjectsButton, QtWidgets.SIGNAL("clicked()"), self.saveObjects)        
        self.connect(self.loadObjectsButton, QtWidgets.SIGNAL("clicked()"), self.loadObjects)                        
        self.connect(self.loadObjectsSelectionButton, QtWidgets.SIGNAL("clicked()"), self.loadObjectsSelection)   
                            
        self.connect(self.saveVerticesButton, QtWidgets.SIGNAL("clicked()"), self.saveVertices)        
        self.connect(self.loadVerticesButton, QtWidgets.SIGNAL("clicked()"), self.loadVertices)                        
                
    def selectObjectsFile(self):
        fileResult = cmds.fileDialog2()
        if fileResult != None:
            self.objectsFileLine.setText(fileResult[0])

    def selectVerticesFile(self):
        fileResult = cmds.fileDialog2()
        if fileResult != None:       
            self.verticesFileLine.setText(fileResult[0])

    
    def loadObjects(self):
        bLoadSkinValues (False, str(self.objectsFileLine.text()))
        
    def loadObjectsSelection(self):
        bLoadSkinValues (True, str(self.objectsFileLine.text()))
        
    def saveObjects(self):
        bSaveSkinValues(str(self.objectsFileLine.text()))
         
    def loadVertices(self):
        bLoadVertexSkinValues (str(self.verticesFileLine.text()))
        
    def saveVertices(self):   
        bSaveVertexSkinValues(str(self.verticesFileLine.text()))

    

bSkinPath = OpenMaya.MDagPath()
def bFindSkinCluster(objectName):    
    it = OpenMaya.MItDependencyNodes(OpenMaya.MFn.kSkinClusterFilter)
    while not it.isDone():
        fnSkinCluster = OpenMayaAnim.MFnSkinCluster(it.item())
        fnSkinCluster.getPathAtIndex(0,bSkinPath)
                
        if OpenMaya.MFnDagNode(bSkinPath.node()).partialPathName() == objectName or OpenMaya.MFnDagNode(OpenMaya.MFnDagNode(bSkinPath.node()).parent(0)).partialPathName() == objectName:
            return it.item()
        it.next()
    return False



def bLoadVertexSkinValues(inputFile):

    line = ''
    joints = []
    weights = []
    splittedStrings = []
    splittedWeights = []
    weightDoubles = OpenMaya.MDoubleArray()
    selectionList = OpenMaya.MSelectionList()
    vertexCount = 0;

    OpenMaya.MGlobal.getActiveSelectionList( selectionList );
    node = OpenMaya.MDagPath()
    component = OpenMaya.MObject()
    selectionList.getDagPath( 0, node, component );

    if not node.hasFn(OpenMaya.MFn.kTransform):
        print 'select a skinned object'



    NewTransform = OpenMaya.MFnTransform (node)
    if not NewTransform.childCount() or not NewTransform.child(0).hasFn(OpenMaya.MFn.kMesh):
        print 'select a skinned object..'

    mesh = NewTransform.child(0);
    objectName = OpenMaya.MFnDagNode(mesh).name()
    skinCluster = bFindSkinCluster(objectName)
    if not skinCluster.hasFn(OpenMaya.MFn.kSkinClusterFilter):
        print 'select a skinned object'

    fnSkinCluster = OpenMayaAnim.MFnSkinCluster(skinCluster)
    input = open(inputFile, 'r')

    joints = []
    weightLines = []
    filePosition = 0
    while True:
        line = input.readline().strip()
        if not line:
            break

        if filePosition == 0:
            vertexCount = int(line)
            filePosition = 1
        elif filePosition == 1:
            if not line.startswith("========"):
                joints.append(line)
            else:
                filePosition = 2;        
        elif filePosition == 2:
            weightLines.append(line)

    if OpenMaya.MItGeometry(node).count() != vertexCount:
        print "vertex counts don't match, result might be bad"



    # joints..
    influenceArray = OpenMaya.MDagPathArray()
    influenceStringArray = []
    influenceMapArray = OpenMaya.MIntArray()
    jointsMapArray = OpenMaya.MIntArray()

    infCount = fnSkinCluster.influenceObjects(influenceArray)
    for i in range(infCount):
        influenceStringArray.append(OpenMaya.MFnDagNode(influenceArray[i]).name())      
        influenceMapArray.append(-1)
        for k in range(len(joints)):
            if influenceStringArray[i] == joints[k]:
                influenceMapArray[i] = k

    for i in range(len(joints)):
        jointsMapArray.append(-1);

    allInfluencesInScene = True
    influenceInScene = False
    for i in range(len(joints)):
        influenceInScene = False
        for k in range(len(influenceStringArray)):
            if influenceStringArray[k] == joints[i]:
                influenceInScene = True
                jointsMapArray[i] = k

        if not influenceInScene:
            allInfluencesInScene = False
            print joints[i], ' is missing in the skinCluster'

    if not allInfluencesInScene:
        print 'There are influences missing'
        return

    extraInfluencesCount = 0

    for i in range(len(influenceStringArray)):
        jointInInfluences = False
        for k in range(len(joints)):
            if joints[k] == influenceStringArray[i]:
                jointInInfluences = True
        if not jointInInfluences:
            jointsMapArray.append(i)
            extraInfluencesCount += 1

    #load points
    fnVtxComp = OpenMaya.MFnSingleIndexedComponent()
    vtxComponents = OpenMaya.MObject()
    vtxComponents = fnVtxComp.create( OpenMaya.MFn.kMeshVertComponent )

    for i in range(len(weightLines)):
        splittedStrings = weightLines[i].split(':');
        if len(splittedStrings) > 1:
            fnVtxComp.addElement(int(splittedStrings[0]))
            splittedWeights = splittedStrings[1].split(' ')
            for k in range(len(splittedWeights)):
                weightDoubles.append(float(splittedWeights[k]))

            weightDoubles += [0] * extraInfluencesCount


    #SET WEIGHTS 
    fnSkinCluster.setWeights(bSkinPath, vtxComponents, jointsMapArray, weightDoubles, 0)

    # select the vertices
    pointSelectionList = OpenMaya.MSelectionList()
    pointSelectionList.add(OpenMaya.MDagPath(node),vtxComponents);
    OpenMaya.MGlobal.setActiveSelectionList(pointSelectionList);



def bSaveVertexSkinValues(inputFile):
    print 'saving Vertex skinWeights.. '

    selection = OpenMaya.MSelectionList()
    OpenMaya.MGlobal.getActiveSelectionList( selection );
    iterate = OpenMaya.MItSelectionList(selection);
    while not iterate.isDone():
        dagPath = OpenMaya.MDagPath()
        component = OpenMaya.MObject();
        iterate.getDagPath(dagPath, component);
        skinCluster = bFindSkinCluster(OpenMaya.MFnDagNode(dagPath).partialPathName())
        fnSkinCluster = OpenMayaAnim.MFnSkinCluster(skinCluster);
        iterate.next()

        if skinCluster.hasFn(OpenMaya.MFn.kSkinClusterFilter):
            output = open(inputFile, 'w')
            output.write(str(OpenMaya.MItGeometry(bSkinPath).count()) + '\n')

            fnVtxComp = OpenMaya.MFnSingleIndexedComponent()
            vtxComponents = OpenMaya.MObject();
            vtxComponents = fnVtxComp.create( OpenMaya.MFn.kMeshVertComponent );

            WeightArray = OpenMaya.MFloatArray()
            meshIter = OpenMaya.MItMeshVertex ( dagPath, component)
            while not meshIter.isDone():
                fnVtxComp.addElement( meshIter.index());
                meshIter.next()

            vertexCount = meshIter.count();
            scriptUtil = OpenMaya.MScriptUtil()
            infCountPtr = scriptUtil.asUintPtr()     
            fnSkinCluster.getWeights(bSkinPath, vtxComponents, WeightArray, infCountPtr)
            infCount = OpenMaya.MScriptUtil.getUint(infCountPtr)

            weightCheckArray = []
            for i in range(infCount):
                weightCheckArray.append(False)

            for i in range(vertexCount):
                for k in range(infCount):
                    if not weightCheckArray[k] and WeightArray[((i * infCount) + k)]:
                        weightCheckArray[k] = True

            #joints.. 
            InfluentsArray = OpenMaya.MDagPathArray()
            fnSkinCluster.influenceObjects(InfluentsArray);
            for i in range(infCount):
                if (weightCheckArray[i]):
                    output.write(OpenMaya.MFnDagNode(InfluentsArray[i]).name() + '\n')

            output.write('============\n')

            counter = 0;
            weightArrayString = []
            meshIter = OpenMaya.MItMeshVertex (dagPath, component)
            while not meshIter.isDone():
                weightArrayString = str(meshIter.index()) + ':'

                for k in range(infCount):
                    if weightCheckArray[k] == True:
                        weightArrayString += str(WeightArray[(counter * infCount) + k]) + ' '

                output.write(weightArrayString + '\n')
                counter += 1
                meshIter.next()

            output.close()
            iterate.next()




def bSaveSkinValues(inputFile):

    output = open(inputFile, 'w')

    selection = OpenMaya.MSelectionList()
    OpenMaya.MGlobal.getActiveSelectionList(selection)

    iterate = OpenMaya.MItSelectionList(selection)

    while not iterate.isDone():
        node = OpenMaya.MDagPath()
        component = OpenMaya.MObject()
        iterate.getDagPath (node, component)
        if not node.hasFn(OpenMaya.MFn.kTransform):
            print OpenMaya.MFnDagNode(node).name() + ' is not a Transform node (need to select transform node of polyMesh)'
        else:
            objectName = OpenMaya.MFnDagNode(node).name()
            newTransform = OpenMaya.MFnTransform(node)
            for childIndex in range(newTransform.childCount()):
                childObject = newTransform.child(childIndex)
                if childObject.hasFn(OpenMaya.MFn.kMesh) or childObject.hasFn(OpenMaya.MFn.kNurbsSurface) or childObject.hasFn(OpenMaya.MFn.kCurve):
                    skinCluster = bFindSkinCluster(OpenMaya.MFnDagNode(childObject).partialPathName())
                    if skinCluster is not False:
                        bSkinPath = OpenMaya.MDagPath()
                        fnSkinCluster = OpenMayaAnim.MFnSkinCluster(skinCluster)
                        fnSkinCluster.getPathAtIndex(0,bSkinPath)
                        influenceArray = OpenMaya.MDagPathArray()
                        fnSkinCluster.influenceObjects(influenceArray)
                        influentsCount = influenceArray.length()
                        #output.write(bSkinPath.partialPathName() + '\n')
                        output.write(objectName + '\n')

                        for k in range(influentsCount):
                            jointTokens = str(influenceArray[k].fullPathName()).split('|')
                            jointTokens = jointTokens[len(jointTokens)-1].split(':')
                            output.write(jointTokens[len(jointTokens)-1] + '\n')

                        output.write('============\n')

                        vertexIter = OpenMaya.MItGeometry(bSkinPath)

                        saveString = ''
                        counterValue = 0
                        while not vertexIter.isDone():
                            counterValue = counterValue + 1
                            vertex = vertexIter.component()

                            scriptUtil = OpenMaya.MScriptUtil()
                            infCountPtr = scriptUtil.asUintPtr()     
                            vtxComponents = OpenMaya.MObject()     
                            weightArray = OpenMaya.MDoubleArray()  

                            fnSkinCluster.getWeights(bSkinPath, vertex, weightArray, infCountPtr)

                            saveString = ''

                            for j in range(OpenMaya.MScriptUtil.getUint(infCountPtr)):
                                saveString += str(weightArray[j])
                                saveString += ' '

                            output.write(saveString + '\n')

                            vertexIter.next()
                        output.write('\n')


        iterate.next()

    output.close()
    print "done saving weights"





def bSkinObject(objectName, joints, weights):

    if not cmds.objExists(objectName):
        print objectName, " doesn't exist - skipping. "
        return
    
    allInfluencesInScene = True;
    jointsCheck = [] 
    for i in range(len(joints)):
        jointsCheck = joints[i]

    sceneJointTokens = []
    fileJointTokens = []

    it = OpenMaya.MItDependencyNodes ( OpenMaya.MFn.kJoint);
    # quick check:
    for jointIndex in range(len(joints)):
        jointHere = False;
        it = OpenMaya.MItDependencyNodes ( OpenMaya.MFn.kJoint)
        while not it.isDone():                
            sceneJointTokens = str(OpenMaya.MFnDagNode(it.item()).fullPathName()).split('|')
            if str(joints[jointIndex]) == str(sceneJointTokens[len(sceneJointTokens) - 1]):
                jointHere = True;

            it.next()

        if not jointHere:
            allInfluencesInScene = False;
            print 'missing influence: ', joints[jointIndex]



    if not allInfluencesInScene:
        print objectName, " can't be skinned because of missing influences."
        return

    #maya.mel.eval("undoInfo -st 0")

    
    if type(bFindSkinCluster(objectName)) != type(True):
        maya.mel.eval("DetachSkin " + objectName)

    cmd = "select "
    for i in range(len(joints)):
        cmd += " " + joints[i]

    cmd += " " + objectName
    maya.mel.eval(cmd)

    maya.mel.eval("skinCluster -tsb -mi 10");
    maya.mel.eval("select `listRelatives -p " + objectName + "`");
    maya.mel.eval("refresh")
    #maya.mel.eval("undoInfo -st 1")

    skinCluster = bFindSkinCluster(objectName)
    fnSkinCluster = OpenMayaAnim.MFnSkinCluster(skinCluster)
    InfluentsArray = OpenMaya.MDagPathArray()
    fnSkinCluster.influenceObjects(InfluentsArray)

    bSkinPath = OpenMaya.MDagPath()
    fnSkinCluster.getPathAtIndex(fnSkinCluster.indexForOutputConnection(0),bSkinPath)

    weightStrings = []
    vertexIter = OpenMaya.MItGeometry (bSkinPath)

    weightDoubles = OpenMaya.MDoubleArray()


    singleIndexed = True;
    vtxComponents = OpenMaya.MObject()
    fnVtxComp = OpenMaya.MFnSingleIndexedComponent()
    fnVtxCompDouble = OpenMaya.MFnDoubleIndexedComponent()

    
    if bSkinPath.node().apiType() == OpenMaya.MFn.kMesh:
        vtxComponents = fnVtxComp.create( OpenMaya.MFn.kMeshVertComponent )
    elif bSkinPath.node().apiType() == OpenMaya.MFn.kNurbsSurface:
        singleIndexed = False
        vtxComponents = fnVtxCompDouble.create( OpenMaya.MFn.kSurfaceCVComponent )
    elif bSkinPath.node().apiType() == OpenMaya.MFn.kNurbsCurve:
        vtxComponents = fnVtxComp.create( OpenMaya.MFn.kCurveCVComponent )
   
    #mapping joint-indices
    influenceIndices = OpenMaya.MIntArray()
    checkInfluences = []

    for k in range(InfluentsArray.length()):
        checkInfluences.append(0)
    for i in range(len(joints)):
        influenceIndices.append(-1)

    for i in range(len(joints)):
        fileJointTokens = joints[i].split('|')

        for k in range(InfluentsArray.length()):

            sceneJointTokens = str(OpenMaya.MFnDagNode(InfluentsArray[k]).fullPathName()).split('|')
            if fileJointTokens[len(fileJointTokens) - 1] == sceneJointTokens[len(sceneJointTokens) - 1]:  # changed from joints
                influenceIndices[i] = k
                checkInfluences[k] = 1        

    counterValue = 0;
    if not singleIndexed:
        currentU = 0
        currentV = 0

        cvsU = OpenMaya.MFnNurbsSurface(bSkinPath.node()).numCVsInU()
        cvsV = OpenMaya.MFnNurbsSurface(bSkinPath.node()).numCVsInV()
        formU = OpenMaya.MFnNurbsSurface(bSkinPath.node()).formInU()
        formV = OpenMaya.MFnNurbsSurface(bSkinPath.node()).formInV()
	
        if formU == 3:
            cvsU -= 3
        if formV == 3:
            cvsV -= 3
    
    
    vertexIter = OpenMaya.MItGeometry (bSkinPath)
    while not vertexIter.isDone():
        weightStrings = []
        if singleIndexed:
            fnVtxComp.addElement(counterValue)
        else:
            fnVtxCompDouble.addElement(currentU, currentV)
            currentV += 1;
            if currentV >= cvsV:
                currentV = 0
                currentU += 1

        weightStrings = weights[counterValue].split(' ');
        for i in range(len(weightStrings)):
            weightDoubles.append(float(weightStrings[i]))
        counterValue += 1
        vertexIter.next()

    #SET WEIGHTS 
    print "setting weights for  ", objectName
    fnSkinCluster.setWeights(bSkinPath, vtxComponents, influenceIndices,weightDoubles, 0)
    #Maya.mel.eval("skinPercent -normalize true " + fnSkinCluster.name() + " " + objectName)

    influenceIndices.clear();
    weightDoubles.clear();



def bLoadSkinValues(loadOnSelection, inputFile):
    joints = []
    weights = []
    PolygonObject = ""


    if loadOnSelection == True:
        selectionList = OpenMaya.MSelectionList()
        OpenMaya.MGlobal.getActiveSelectionList(selectionList)
        node = OpenMaya.MDagPath()
        component = OpenMaya.MObject()
        if selectionList.length():
            selectionList.getDagPath( 0, node, component )
            if node.hasFn(OpenMaya.MFn.kTransform):
	            NewTransform = OpenMaya.MFnTransform (node)
	            if NewTransform.childCount():
		            if NewTransform.child(0).hasFn(OpenMaya.MFn.kMesh):
			            PolygonObject = str(OpenMaya.MFnDagNode(NewTransform.child(0)).partialPathName())



    if loadOnSelection and len(PolygonObject) == 0:
        print "You need to select a polygon object"
        return

    input = open(inputFile, 'r')

    FilePosition = 0
    while True:
        line = input.readline()
        if not line:
            break

        line = line.strip()

        if FilePosition is not 0:
            if not line.startswith("============"):
                if FilePosition is 1:
                    joints.append(line) 
                elif FilePosition is 2:
                    if len(line) > 0:
                        weights.append(line)
                    else:
                        bSkinObject(PolygonObject, joints, weights)
                        PolygonObject = ""
                        joints = []
                        weights = []
                        FilePosition = 0
                        if loadOnSelection == True:
                            break

            else: # it's ========
                FilePosition = 2

        else: #FilePosition is 0
            if not loadOnSelection:
                PolygonObject = line
            FilePosition = 1;
            
            if cmds.objExists(PolygonObject):
                maya.mel.eval("select " + PolygonObject)
                maya.mel.eval("refresh")

If anyone can help i would be very thankfull

#20

Well it looks like that on line 43 you’ve got QtWidgets.WindowStaysOnTopHint which isn’t valid, I believe that flag still exists in the QtCore.Qt namespace.