PySideのスロットを定義する際の注意(2) ref: http://qiita.com/FGtatsuro/items/524c85c5df88bdcc0135

onoff_button.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import sys
from PySide.QtGui import QApplication, QMainWindow, QWidget, QPushButton,\
    QVBoxLayout


class OnOffButtonWidget(QWidget):

    def __init__(self):
        super(OnOffButtonWidget, self).__init__()
        self.__init_ui()
        self.__init_event()

    def __init_ui(self):
        self.button1 = QPushButton('button1', self)
        self.button2 = QPushButton('button2', self)
        self.button1.setCheckable(True)
        self.button2.setCheckable(True)

        vbox = QVBoxLayout()
        vbox.addWidget(self.button1)
        vbox.addWidget(self.button2)
        self.setLayout(vbox)

    def __init_event(self):
        self.button1.clicked.connect(self.without_arg)
        self.button2.clicked[bool].connect(self.with_arg)

    def without_arg(self):
        print 'without_arg'

    def with_arg(self, clicked):
        print 'with arg:{0}'.format(clicked)


def main():
    app = QApplication(sys.argv)
    window = QMainWindow()
    window.setCentralWidget(OnOffButtonWidget())
    window.show()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

output

without_arg   (button1クリック時の出力)
with arg:True (button2クリック時の出力)

signal_with_arg

self.button2.clicked[bool].connect(self.with_arg)

signal_without_arg

# (object).(signal).connect(slot)
self.button1.clicked.connect(self.without_arg)