Qt, Python Global problem

TanerTekin

I wrote very simple python & Qt code.

@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_Form(object):

def setupUi(self, Form):
    Form.setObjectName(_fromUtf8("Form"))
    Form.resize(619, 501)
    self.pushButton = QtGui.QPushButton(Form)
    self.pushButton.setGeometry(QtCore.QRect(60, 460, 98, 27))
    self.pushButton.setObjectName(_fromUtf8("pushButton"))
    self.comboBox = QtGui.QComboBox(Form)
    self.comboBox.setGeometry(QtCore.QRect(20, 410, 78, 27))
    self.comboBox.setObjectName(_fromUtf8("comboBox"))
    self.comboBox.addItem(_fromUtf8(""))
    self.comboBox.addItem(_fromUtf8(""))
    self.comboBox.addItem(_fromUtf8(""))
    self.comboBox_2 = QtGui.QComboBox(Form)
    self.comboBox_2.setGeometry(QtCore.QRect(120, 410, 78, 27))
    self.comboBox_2.setObjectName(_fromUtf8("comboBox_2"))
    self.comboBox_2.addItem(_fromUtf8(""))
    self.comboBox_2.addItem(_fromUtf8(""))
    self.comboBox_2.addItem(_fromUtf8(""))
    self.label = QtGui.QLabel(Form)
    self.label.setGeometry(QtCore.QRect(20, 380, 81, 21))
    self.label.setObjectName(_fromUtf8("label"))
    self.label_2 = QtGui.QLabel(Form)
    self.label_2.setGeometry(QtCore.QRect(120, 380, 91, 21))
    self.label_2.setObjectName(_fromUtf8("label_2"))

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

def retranslateUi(self, Form):
    Form.setWindowTitle(_translate("Form", "Form", None))
    self.pushButton.setText(_translate("Form", "BASLA", None))
    self.comboBox.setItemText(0, _translate("Form", "780", None))
    self.comboBox.setItemText(1, _translate("Form", "1350", None))
    self.comboBox.setItemText(2, _translate("Form", "1850", None))
    self.comboBox_2.setItemText(0, _translate("Form", "64", None))
    self.comboBox_2.setItemText(1, _translate("Form", "128", None))
    self.comboBox_2.setItemText(2, _translate("Form", "256", None))
    self.label.setText(_translate("Form", "USRP FRQ", None))
    self.label_2.setText(_translate("Form", "FFT BOYUTU", None))

def deger(self):
    self.us=int(self.comboBox.currentText()) 
    #print "USRP Frekansı",self.us
    self.fft=int(self.comboBox_2.currentText()) 
    #print "FFT Boyutu",self.fft
  
def basla(self):

    QtCore.QObject.connect(self.pushButton, QtCore.SIGNAL("clicked()"), self.deger)

if name == "main":
import sys
app = QtGui.QApplication(sys.argv)
Form = QtGui.QWidget()
ui = Ui_Form()
ui.setupUi(Form)
ui.basla()
Form.show()
print ui.us
app.exec_()
@

When I'm running the program, I get an error message.

@Traceback (most recent call last):
File "./dene.py", line 88, in <module>
print ui.us
AttributeError: 'Ui_Form' object has no attribute 'us'.@

I tried :

@def deger():
global us
us=int(comboBox.currentText())@

I am getting the following error at this time.:

@File "./tt2.py", line 71, in <module>
print us
NameError: global name 'us' is not defined@

What could be the cause of this error?
How do I avoid this error?
Help me, Please.

andreyc

ui.us is not defined until you clicked a button.
And you click button only after you call app.exec_()
So you need to print ui.us in some other place like inside deger().
Another option will be to define us in a constructor but it will be empty until you click a button.