i want ask a simple question. i have 2 classes. i got many functions. i keep functions on class operationsOnFiles(), and ui elements on class UI_MainWindow(object). i use a btnSetRandomWallpaper button call settingRandomWallpaper() function with liste argument and it didnt work. so i used lambda there. then it works. i tried to do same thing with my other function updateList(). it doesnt have any argument. same errors and i used lambda there too. no error but no action too. am i missing a point? or something?
class operationsOnFiles():
def settingRandomWallpaper(self, liste):
super().__init__()
selectedWallpaper = random.choice(liste)
os.system("gsettings set org.gnome.desktop.background picture-uri /home/$USER/Projects/src/" + selectedWallpaper)
def updateList():
super().__init__()
Ui_MainWindow.listWidget.addItems(selfish.wallpapers)
selfish = operationsOnFiles()
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
self.btnSetRandomWallpaper.clicked.connect(lambda: selfish.settingRandomWallpaper(selfish.wallpapers))
self.btnUpdateList.clicked.connect(lambda: operationsOnFiles.updateList)
The connect event is called without parameters. If the target function needs some parameters known at the time the listener is created, you can use a lambda to bind that value. If the target doesn't need parameters, you don't need the intermediate lambda. In your case the the problem is that you created a lambda that just returns the method you want. Minimally it should call the method. But since it doesn't need an additional parameter the lambda isn't needed at all.
self.btnUpdateList.clicked.connect(operationsOnFiles.updateList)
This will expose the next bug in your code, updateList needs a self (def updateList(self):. And then calling super's __init__ is really strange.
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