How to pass arguments to functions by the click of button in PyQt?

Question

I want to pass the arguments to a function when I click the button. What should I add to this line button.connect(button, QtCore.SIGNAL(\'clicked()\'), calluser(name))

Answer 1

The code shown below illustrates a method of associating data with generated buttons. For example, you could change the statement self.keydata[b] = key to store a tuple of data into self.keydata[b] for use when processing a button event later.

Note, in the following code, assets is a previously-defined dictionary containing titles for buttons. In the processButton(self) routine, self.sender() is equal to an entry in the class variable buttons[].

class Tab5(QtGui.QWidget):
    buttons, keydata = {}, {}
    def __init__(self, fileInfo, parent=None):
        super(Tab5, self).__init__(parent)
        layout = QtGui.QVBoxLayout()

        for key in sorted(assets):
            b = self.buttons[key] = QtGui.QPushButton(assets[key], self)
            b.clicked.connect(self.processButton)
            layout.addWidget(b)
            print 'b[key]=',b, ' b-text=',assets[key]
            self.keydata[b] = key

        layout.addStretch(1)
        self.setLayout(layout)

    def processButton(self):
         print 'sender=',self.sender(), ' s-text=',self.sender().text(), ' data[.]=', self.keydata[self.sender()] 
         pass

Output was like the following, where the first four lines printed during the for loop, and the last four printed when the four buttons were pressed in order.

b[key]=   b-text= K1
b[key]=   b-text= K2
b[key]=   b-text= K3
b[key]=   b-text= K4
sender=   s-text= K1  data[.]= L1
sender=   s-text= K2  data[.]= L2
sender=   s-text= K3  data[.]= L3
sender=   s-text= K4  data[.]= L4