sampleDialog_houdini.py

from PySide import QtCore
from PySide import QtGui

class Example(QtGui.QWidget):

    def __init__(self, parent=None):
        super(Example, self).__init__(parent)
        self.initUI()

    def initUI(self):
        self.setGeometry(300, 300, 250, 150)
        self.setWindowTitle('Panel Title')

        Lbox = QtGui.QVBoxLayout()

        self.text = QtGui.QLineEdit('text', self)
        Lbox.addWidget(self.text)
        button = QtGui.QPushButton('button', self)
        Lbox.addWidget(button)
        
        self.setLayout(Lbox)

        # Set Signal
        button.clicked.connect(self.buttonPush)

    def buttonPush(self):
        textVal = self.text.text()
        print textVal

dialog = Example()
dialog.setParent(hou.ui.mainQtWindow(), QtCore.Qt.Window)
dialog.show()