实施PyQt的基本示例时出错

问题描述：

我正在通过基本的PyQt设计器示例创建一个脚本来接受两个数字并添加它们。实施PyQt的基本示例时出错

我创建了calc_ui.py文件：

from PyQt4 import QtCore, QtGui 

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_CalculatorUI(object): 
    def setupUi(self, CalculatorUI): 
     CalculatorUI.setObjectName(_fromUtf8("CalculatorUI")) 
     CalculatorUI.resize(219, 134) 
     self.gridLayout = QtGui.QGridLayout(CalculatorUI) 
     self.gridLayout.setObjectName(_fromUtf8("gridLayout")) 
     self.labelX = QtGui.QLabel(CalculatorUI) 
     self.labelX.setObjectName(_fromUtf8("labelX")) 
     self.gridLayout.addWidget(self.labelX, 0, 0, 1, 1) 
     self.lineEditX = QtGui.QLineEdit(CalculatorUI) 
     self.lineEditX.setObjectName(_fromUtf8("lineEditX")) 
     self.gridLayout.addWidget(self.lineEditX, 0, 1, 1, 1) 
     self.labelY = QtGui.QLabel(CalculatorUI) 
     self.labelY.setObjectName(_fromUtf8("labelY")) 
     self.gridLayout.addWidget(self.labelY, 1, 0, 1, 1) 
     self.lineEditY = QtGui.QLineEdit(CalculatorUI) 
     self.lineEditY.setObjectName(_fromUtf8("lineEditY")) 
     self.gridLayout.addWidget(self.lineEditY, 1, 1, 1, 1) 
     self.labelZ = QtGui.QLabel(CalculatorUI) 
     self.labelZ.setObjectName(_fromUtf8("labelZ")) 
     self.gridLayout.addWidget(self.labelZ, 2, 0, 1, 1) 
     self.lineEditZ = QtGui.QLineEdit(CalculatorUI) 
     self.lineEditZ.setReadOnly(True) 
     self.lineEditZ.setObjectName(_fromUtf8("lineEditZ")) 
     self.gridLayout.addWidget(self.lineEditZ, 2, 1, 1, 1) 
     self.buttonCalc = QtGui.QPushButton(CalculatorUI) 
     self.buttonCalc.setObjectName(_fromUtf8("buttonCalc")) 
     self.gridLayout.addWidget(self.buttonCalc, 3, 0, 1, 2) 

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

    def retranslateUi(self, CalculatorUI): 
     CalculatorUI.setWindowTitle(_translate("CalculatorUI", "Calculator", None)) 
     self.labelX.setText(_translate("CalculatorUI", "X:", None)) 
     self.labelY.setText(_translate("CalculatorUI", "Y:", None)) 
     self.labelZ.setText(_translate("CalculatorUI", "Z:", None)) 
     self.buttonCalc.setText(_translate("CalculatorUI", "Calculate", None))

我main.py是：

from PyQt4 import QtGui, QtCore 
import sys 
from calc_ui import Ui_CalculatorUI 

class Calculator(Ui_CalculatorUI): 
    def __init__(self): 
     Ui_CalculatorUI.__init__(self) 
     #self.setupUi(self) 
     self.buttonCalc.clicked.connect(self.handleCalculate) 

    def handleCalculate(self): 
     x = int(self.lineEditX.text()) 
     y = int(self.lineEditY.text()) 
     self.lineEditZ.setText(str(x + y)) 

if __name__ == '__main__': 
    app = QtGui.QApplication(sys.argv) 
    window = Calculator() 
    window.show() 
    sys.exit(app.exec_())

然而，我的错误是：

AttributeError: 'Calculator' object has no attribute 'buttonCalc'

即使我可以看到'buttonCalc'有已在calc_ui.py文件中定义。

我已经尝试了不同的语法，但在这里遇到了墙。

答

Qt设计产生的一类，以填补一个小部件，即是不是一个小部件，你必须创建一个从我采取为模板控件继承的类，假设它是对话，那么你应该调用setupUi()功能填充小部件

class Calculator(QtGui.QDialog, Ui_CalculatorUI): 
    def __init__(self, parent=None): 
     QtGui.QDialog.__init__(self, parent) 
     self.setupUi(self) 
     self.buttonCalc.clicked.connect(self.handleCalculate) 

    def handleCalculate(self): 
     x = int(self.lineEditX.text()) 
     y = int(self.lineEditY.text()) 
     self.lineEditZ.setText(str(x + y))

输出：

实施PyQt的基本示例时出错

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