what is the error in the itemclicked?

Question

i have a python that includes a list that handle the path of existing PDF FILES in the selected folder.

what i want is to make the system print in the console the selected item when the user click on the item.

so it must be connect to an itemclick event.

i will appreciate any help.

the system display this exception :

this error occure 'NoneType' object has no attribute 'text'

this is how i tried to make it : self.listWidgetPDFlist.itemClicked.... how to continue?

create an empty list

fileList=[]

loop over the selected folder and add the matched item to the widgetList

for root,dirs,files in os.walk(directory):
            for filename in files:
                if filename.endswith('.pdf'):
                    t=os.path.join(directory,filename)
                    print(t)
                    #fileList.extend(t)
                    fileList.append(t)

        # add the list into the  listWidgetPDFlist          
        self.listWidgetPDFlist.addItems(fileList)

upon selection of an item make the system print in the console the current item

self.listWidgetPDFlist.itemClicked(print(self.listWidgetPDFlist.currentItem().text()))

the problem is in the above line of code

Answer 1

Item clicked is a signal and must be connected to function.

self.listWidgetPDFlist.itemClicked.connect(lambda: print(self.listWidgetPDFlist.currentItem().text()))

The line above uses a lambda statement to print the selected item in a single line of code. This will work for very simple things like you are trying to do here, but you can also connect this to a method to do more.

    self.listWidgetPDFlist.itemClicked.connect(self.print_item)

def print_item(self):
    print(self.listWidgetPDFlist.currentItem().text())
    # handle other items here

When connecting to a method you must leave the parentheses off the methods name when connecting it to the signal.