How to create borderless window in PySide?

I have the following code in PySide in Maya:

import maya.cmds as cmds
from PySide import QtCore, QtGui
import maya.OpenMayaUI as mui
import shiboken

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


class MainWindowUI(QtGui.QDialog):
    parent = getMayaWindow()
    def __init__(self,  parent=parent):
        super(MainWindowUI, self).__init__(parent)

        self.initUI()

    def initUI(self):

        # layout
        QVlayout = QtGui.QVBoxLayout()
        self.setLayout(QVlayout)

        #check for open Window first
        wnName = "WindowTest01"
        if cmds.window(wnName, exists =1):
            cmds.deleteUI(wnName, wnd=True)


        self.setObjectName(wnName)
        self.setWindowTitle("WindowTest01")
        self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
        self.setStyleSheet("background-color: transparent; border-radius: 100px;")

        self.setWindowFlags(QtCore.Qt.FramelessWindowHint)
        self.setMinimumSize(560,800)
        self.setMaximumSize(560,800)        
        self.setWindowOpacity(0.9)    

        self.show()

class TabsMaker():
    pass



class buttonsMaker():
    pass


if __name__ == "__main__" :
    MainWindowUI()   

I need the window to be without borders, and adjust the transparency, when I do I load a screen with the measures of the established but with all distorted inside, without being able to move it, without closing button. How can I achieve this?