PyQt slot return value

[thumperj]

Any help with this would be appreciated, including hints on how to debug further.

The pyqtSlot decorator takes a result as one of the parameters. However, I'm lost as to how to use it. Here's code to replicate my minimal problem.

@
import sys

from PyQt5.QtWidgets import QApplication
from PyQt5.QtCore import pyqtSlot, pyqtSignal, QObject

class TestSlot( QObject ):

newTrigger = pyqtSignal()

def __init__( self ):
    super( TestSlot, self ).__init__()

def doIt( self ):
    print "Call: doIt"
    test = self.newTrigger.emit()
    print "emit return val: %s" % test

@pyqtSlot( result = str )
def myTestFunction( self ):
    print "Call: myTestFunction"
    result = "Here's a return value"
    return "Even returning a string"

app = QApplication( sys.argv )

w = TestSlot()
w.newTrigger.connect( w.myTestFunction )

the_return_val = w.doIt()
print "Doit return value: %s" % the_return_val
@

The results from this are:
@➜ python testme.py
Call: doIt
Call: myTestFunction
emit return val: None
Doit return value: None
@

Where is my return value?

[redstoneleo]

see more "here":http://pyqt.sourceforge.net/Docs/PyQt4/new_style_signals_slots.html

[Marc243]

@pyqtSlot( result = str ) is only for the C++ declaration.
you can not use the return value with an emit Event. ;-(

see http://stackoverflow.com/questions/11272951/pyqt4-pyqtslot-what-is-the-result-kwarg-for