Select columns from a QTableWidget

[jacek]

This is of course inside the function openFile(). This line instructs the program to update the global dictionary {updVars} in its element "SelectedColumns" (which is a Python list) with any - if any - selected columns of the table tbl_OpenFile.

As you wrote earlier, you first invoke openFile(), then you select columns and finally you call showList(). The problem is that you check what columns were selected in openFile(), that is before you select them. Move that line to showList() and it should work.

Do you really need that global dictionary?