i have qmainwindow creates qlistwidget , qtreeviewwidget , places them in qdockwidget. have "open" action in menu bar. when clicked gives dialog choose pickle file load. upon opening need information loaded qtreeview , qlistwidget in qmainwindow. however, since widgets instantiated upon opening program don't update. works fine if choose file before program starts. works if close , reopen widgets after choose file. so, there way update qmainwindow show updated information after opening new file?
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