Question

Actually the title contains all information needed. Is there an easy function like tableview.resizeColumnsToContents() that allows the maximization of all column widths within the widget size? My columns are narrow so the table looks very compact.

Answer 1

If you want the columns to expand uniformly, you could also set the resize mode

tableview.horizontalHeader().setResizeMode(QtGui.QHeaderView.Stretch)

In pyqt5 setResizeMode is no longer available. Instead, use setSectionResizeMode and QHeaderView in the QtWidgets module.