Click signal in Pyqt4 - python-2.7

Question

I have a list of buttons which is shown to the user according to a particular number which the user enters.For e.g. If the user enters 2 then only 2 buttons will be shown.
The code that does this is here:
def set(self):
global seismicAttributeCount,lineEditlist
seismicAttributeCount=int(self.ui.lineEdit_23.text())
mygroupbox = QtGui.QGroupBox()
myform = QtGui.QFormLayout()
labellist = []
buttonList= []
for i in range(seismicAttributeCount):
lineEditlist.append(QtGui.QLineEdit())
buttonList.append(QtGui.QPushButton('Browse Attribute %i'%(i+1)))
myform.addRow(lineEditlist[i],buttonList[i])
mygroupbox.setLayout(myform)
self.ui.scrollArea_12.setWidget(mygroupbox)
self.ui.scrollArea_12.setWidgetResizable(True)
for i in range(seismicAttributeCount):
if buttonList[i].clicked.connect():
print i
I want to get the index of the button clicked. Any help would be appreciated.

Answer 1

You probably want to look into functools.partial. This allows you to connect an event with a method and a particular input. I've made here a minimal example of a GUI that does what you want
from PyQt4 import QtGui, QtCore
import sys
import functools
class test(QtGui.QWidget):
def __init__(self,parent=None):
self.widget=QtGui.QWidget.__init__(self, parent)
# Button to add buttons
self.btnAdd = QtGui.QPushButton('Add')
self.btnAdd.connect(self.btnAdd, QtCore.SIGNAL('clicked()'), self.btnAddPressed)
# Line edit for number of buttons
self.qleN = QtGui.QLineEdit(str(0))
# List to keep track of buttons
self.buttons=[]
# Layout
self.hbox = QtGui.QHBoxLayout()
self.hbox.addWidget(self.btnAdd)
self.hbox.addWidget(self.qleN)
self.setLayout(self.hbox)
self.show()
def btnAddPressed(self):
"""Adds number of buttons."""
# Get number of buttons to add
n=int(self.qleN.text())
self.buttons=[]
for i in range(n):
# Create new button
newBtn = QtGui.QPushButton(str(i))
self.buttons.append(newBtn)
# Connect
newBtn.clicked.connect(functools.partial(self.btnPressed,i))
self.hbox.addWidget(newBtn)
def btnPressed(self,idx):
"""Returns idx of btn."""
print idx
return idx
def main():
#Creating application
app = QtGui.QApplication(sys.argv)
main_win = test()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
Note how I connect the button with a functools call and the index of the button.
By the way, next time, please make the effort and format your question properly.