PYQT 自定义SLOT函数报错,该如何处理

PYQT 自定义SLOT函数报错

#!/usr/bin/python
#-*-coding:utf-8-*-
#mymoney.py

from PyQt4.QtGui import *
from PyQt4.QtCore import *
import sys

class loginW(QWidget):
    def __init__(self, parent=None):
        QWidget.__init__(self, parent)
        self.resize(250,250)
        self.setWindowTitle('login')

        userLabel=QLabel('username:')
        pwdLabel=QLabel('password:')

        userle=QLineEdit()
        pwdle=QLineEdit()

        okButton=QPushButton('OK')
        cnlButton=QPushButton('Cancel')

        grid = QGridLayout()
        grid.addWidget(userLabel,0,1)
        grid.addWidget(userle,0,2)
        grid.addWidget(pwdLabel,1,1)
        grid.addWidget(pwdle,1,2)
        grid.addWidget(okButton, 2, 1)
        grid.addWidget(cnlButton, 2, 2)
        self.setLayout(grid)

        #okButton.clicked.connect(self.okcheck)

        self.connect(okButton,SIGNAL("clicked()"),self,self.okcheck)
        self.connect(cnlButton,SIGNAL("clicked()"),self,SLOT("close()"))

	def okcheck(self):
		print 'a'


#class MainWindow(QMainWindow):
	"""docstring for MainWindow"""
	def __init__(self):
		QMainWindow.__init__(self)
		
		self.resize(250, 150)
		self.setWindowTitle('mymoney')

		self.statusBar().showMessage('Ready')

app=QApplication(sys.argv)
#main=MainWindow()
main=loginW()
main.show()
app.exec_()
		

初学PYQT,在运行以上代码时，报错：
Traceback (most recent call last):
  File "H:\pyqt\mymoney.py", line 54, in <module>
    main=loginW()
  File "H:\pyqt\mymoney.py", line 35, in __init__
    self.connect(okButton,SIGNAL("clicked()"),self,self.okcheck)
AttributeError: 'loginW' object has no attribute 'okcheck'
[Finished in 1.0s with exit code 1]

求指导
------解决方案--------------------
self.connect(okButton,SIGNAL("clicked()"),self.okcheck)
中间多了一个self
楼主要养成结贴的好习惯