How to write text to listWidget?

Anonymous_Banned275

I realize this is not the forum to ask basic Python questions, but I have no access to another Python forum.

I have a simple code to clear listWidget , but I cannot figure out the correct syntax to add simple text to listWidget.

Here is my code

            self.pushButton_InitializeTRACE.clicked.connect(self.listWidget.clear)
            item_TEST = " Initialize debug TRACE"
            # self.pushButton_InitializeTRACE.clicked.connect(self.listWidget.setToolTip(" Initialize debug TRACE "))
            self.pushButton_InitializeTRACE.clicked.connect(self.listWidget.addItem(self.item_TEST) )


and its resulting error :

File "/mnt/07b7c3f8-0efb-45ab-8df8-2a468771de1f/NANO_WORK/src/NanoVNASaver/NanoVNASaver.py", line 348, in init
"DISPLAY_FORM": TDRWindow_COPY(self), # copy of TDRWindow
File "/mnt/07b7c3f8-0efb-45ab-8df8-2a468771de1f/NANO_WORK/src/NanoVNASaver/Windows/TRACE_FORM.py", line 272, in init
self.pushButton_InitializeTRACE.clicked.connect(self.listWidget.addItem(self.item_TEST) )
AttributeError: 'TDRWindow_COPY' object has no attribute 'item_TEST'

In simple terms 
I can "clear " the listWidget, but I cannot add SIMPLE text to it. 

MrsGoogle showed me how to add items from a list, but I want to add SINGLE  line of text.

The above is a copy from word processor so it may not meet code formatting.
If that is a problem , please IGNORE the post - there is no need to inform me about "code formatting" - it does not solve my code problem.

It would be nice if somebody just wrote correct code and give some explanation why my syntax is wrong .

wrong syntax:
self.pushButton_InitializeTRACE.clicked.connect(self.listWidget.addItem(self.item_TEST) )

Correct syntax here

.....
your syntax IS WRONG BECAUSE HERE

....

Thanks

JonB

@AnneRanch said in How to write text to listWidget?:

self.pushButton_InitializeTRACE.clicked.connect(self.listWidget.addItem(self.item_TEST) )

Try:

self.pushButton_InitializeTRACE.clicked.connect( lambda: self.listWidget.addItem(self.item_TEST) )

You need a lambda here for the slot, that's how you specify inline code like you have to execute rather than connecting to a method.