Why doesn't FileChooserIconView show files?

Question

Python

Good day, here is the code:

a = FileChooserIconView(filters=["DumpStack.log.tmp", "hiberfil.sys", "pagefile.sys", "swapfile.sys"])
popup = Popup(title='Select file', content=a)
popup.open()

But I can't select files, because they are simply not displayed, only directories are displayed. Can
you please tell me why this is happening?