Tela que apresenta os valores, que são atualizados pela função 'gerarValor()' do arquivo 'atualiza.py'.

tela

from PyQt4 import QtCore, QtGui
from PyQt4 import Qwt5
import atualiza

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    def _fromUtf8(s):
        return s

try:
    _encoding = QtGui.QApplication.UnicodeUTF8
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig)


class Ui_Form(object):
    def setupUi(self, Form):
        Form.setObjectName(_fromUtf8("Form"))
        Form.resize(369, 134)
        self.label = QtGui.QLabel(Form)
        self.label.setGeometry(QtCore.QRect(60, 10, 251, 31))
        font = QtGui.QFont()
        font.setPointSize(17)
        font.setBold(True)
        font.setWeight(75)
        self.label.setFont(font)
        self.label.setObjectName(_fromUtf8("label"))
        self.lcdNumber = QtGui.QLCDNumber(Form)
        self.lcdNumber.setGeometry(QtCore.QRect(40, 90, 64, 23))
        font = QtGui.QFont()
        font.setPointSize(8)
        self.lcdNumber.setFont(font)
        self.lcdNumber.setObjectName(_fromUtf8("lcdNumber"))
        self.labelTemp = QtGui.QLabel(Form)
        self.labelTemp.setGeometry(QtCore.QRect(130, 90, 46, 31))
        font = QtGui.QFont()
        font.setPointSize(15)
        self.labelTemp.setFont(font)
        self.labelTemp.setTextFormat(QtCore.Qt.AutoText)
        self.labelTemp.setAlignment(QtCore.Qt.AlignCenter)
        self.labelTemp.setObjectName(_fromUtf8("labelTemp"))
        self.termo = Qwt5.QwtThermo(Form)
        self.termo.setGeometry(QtCore.QRect(190, 70, 161, 41))
        brush = QtGui.QBrush(QtGui.QColor(255, 0, 0))
        brush.setStyle(QtCore.Qt.SolidPattern)
        self.termo.setAlarmBrush(brush)
        self.termo.setAlarmLevel(80.0)
        self.termo.setScalePosition(Qwt5.QwtThermo.TopScale)
        brush = QtGui.QBrush(QtGui.QColor(0, 170, 255))
        brush.setStyle(QtCore.Qt.SolidPattern)
        self.termo.setFillBrush(brush)
        self.termo.setMaxValue(100.0)
        self.termo.setProperty("value", 0.0)
        self.termo.setObjectName(_fromUtf8("termo"))

        self.retranslateUi(Form)
        QtCore.QMetaObject.connectSlotsByName(Form)
        

    def retranslateUi(self, Form):
        Form.setWindowTitle(_translate("Form", "Form", None))
        self.label.setText(_translate("Form", "Widget Temperatura", None))
        self.labelTemp.setText(_translate("Form", "0.0", None))
        


class Widget(QtGui.QWidget):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent=None)
        self.ui = Ui_Form()
        self.ui.setupUi(self)  
    
if __name__ == '__main__':
    import sys
        
    print atualiza.gerarValor()
    app = QtGui.QApplication(sys.argv)
    widget = Widget() 
    
    # atualizar em tempo real, conforme a função gerarValor() altera esse valor.
    widget.ui.lcdNumber.setProperty("intValue", atualiza.gerarValor())
    widget.ui.labelTemp.setText(str(atualiza.gerarValor()))
    widget.ui.termo.setProperty("value", atualiza.gerarValor())
    
    widget.show()
    sys.exit(app.exec_())