[PyQt] No match to overloaded signal

[Jeremy Sanders]

Hi -

Is this an intentional difference between PyQt4 and 5? The PyQt4 version 
works, but PyQt5 gives the error:

Traceback (most recent call last):
  File "test.py", line 16, in <module>
    p.clicked[()].connect(func)
KeyError: 'there is no matching overloaded signal'

Here is the program:

import sys

from PyQt4.QtCore import *
from PyQt4.QtGui import *
#from PyQt5.QtCore import *
#from PyQt5.QtWidgets import *

app = QApplication(sys.argv)

def func():
    print('clicked')

p = QPushButton('Button')
p.clicked[()].connect(func)
p.show()

app.exec_()

Thanks

Jeremy