PyQt和Maya，线程= False？

Question

我一直在调查这个问题3天，没有任何运气。我对这一切都很陌生，所以也许有一些我错过了。

的问题适用于：Maya.cmds，PyMel和评估MEL使用的QThread或只是线程

此代码被设计为在跟随玛雅“mayapy” Python解释器运行。我创建了一个简短的例子，它在多个实例中重新创建相同的错误。

一个按钮的作品，另一个没有。但他们运行相同的代码。

from PyQt4 import Qt 

class doStuff(Qt.QThread): 
    taskProgress = Qt.pyqtSignal(int) 

    # --------------------------------------------------------- # 
    # Here things start to crash... 
    def run(self): 

     # This works 
     persp = mel.general.PyNode('persp') 
     print persp.translateX.get() 

     # This dont work 
     poiLights = mel.general.ls(exactType="pointLight") 
     for light in poiLights: 
      print light 

     # This dont work 
     geo = mel.general.PyNode('pPyramidShape1') 
     print mel.modeling.polyEvaluate(geo, face=True) 

     # Emit progress 
     self.taskProgress.emit(1) 

     return 
    # END 
    # --------------------------------------------------------- # 

class ui(Qt.QWidget): 
    def __init__(self, parent=None): 
     super(ui, self).__init__(parent) 

     # Init QThread 
     self.thread = doStuff() 

     # Create Widgets 
     buttonNo = Qt.QPushButton("Start - Dont work") 
     buttonYes = Qt.QPushButton("Start - Works") 

     # Setup Layout 
     layout = Qt.QVBoxLayout() 
     layout.addWidget(buttonYes) 
     layout.addWidget(buttonNo) 
     self.setLayout(layout) 
     self.show() 

     # -------------------------------- 
     # PROBLEM AREA: Button signals 

     # This one dont work, but starts the thread correctly. 
     self.connect(buttonNo, Qt.SIGNAL("clicked()"), self.thread.start) 

     # This one works, but dont start the thread correctly. 
     self.connect(buttonYes, Qt.SIGNAL("clicked()"), self.thread.run) 

     # -------------------------------- 

     self.thread.taskProgress.connect(self.updateProgress) 

     return 

    # Feedback progress status 
    def updateProgress(self, value): 
     print 'Current progress is:', value 

     return 

if __name__ == '__main__': 

    import sys 
    app = Qt.QApplication(sys.path) 
    program = ui() 

    # init maya 
    import pymel.core as mel 
    filePath = '/Users/ecker/Dropbox/Scripts/RibExporter/mayaScene3ani.ma' 
    mel.openFile(filePath, f=True, o=True) 

    sys.exit(app.exec_()) 

此代码创建按下时开始执行相同功能的2个按钮。一个执行thread.start和thread.run。

thread.start将使线程的工作，因为它应该是能够将数据反馈到了Qt的接口（进度条），但大多数玛雅代码将开始返回各种错误是这样的：

Traceback (most recent call last): 
    File "/Users/ecker/Dropbox/Scripts/RibExporter/error_recreation2.py", line 22, in run 
    poiLights = mel.general.ls(exactType="pointLight") 
    File "/Applications/Autodesk/maya2012/Maya.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python2.6/site-packages/pymel/core/general.py", line 969, in ls 
    res = _util.listForNone(cmds.ls(*args, **kwargs)) 
    File "/Applications/Autodesk/maya2012/Maya.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python2.6/site-packages/pymel/internal/pmcmds.py", line 134, in wrappedCmd 
    res = new_cmd(*new_args, **new_kwargs) 
TypeError: Flag 'long' must be passed a boolean argument 

这是一个布尔参数，不管我以什么样的格式和方式尝试给它什么参数，它总会给出与此非常相似的错误。在同一行res = new_cmd(*new_args, **new_kwargs)需要一个布尔值。

我需要thread到start，不只是运行。除非有不同的线程方法，否则一个解决方法？

Answer 1

Maya对线程无法正常工作。这里的关键是使用maya.utils.executeInMainThreadWithResult。

http://download.autodesk.com/us/maya/2010help/index.html?url=Python_Python_and_threading.htm,topicNumber=d0e182779

我希望这会有所帮助。