Sorting numerical values provided by QAbstractTableModel

[BigMan]

Hi,

I have subclassed QAbstractTableModel, and overwrote its data method like this:

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def data(self, index, role):     if role == Qt.ItemDataRole.DisplayRole:         value = self._daten.iloc[index.row(), index.column()]         if isinstance(value, float): return "%.2f" % value         if isinstance(value, str): return "%s" % value         return str(value)

=> as you can see the method will always return a string. I figured out, if it's not a string, it will not be displayed in the QTableView.
But when I do now a sorting by using QSortFilterProxyModel numbers are now treaded like strings and the sorting is done on an alphanumerical basis.

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self.model = mein_TableModel(daten) self.proxymodel = QtCore.QSortFilterProxyModel() # <<-- I know, I should also use a subclassed QSortFilterProxyModel... but can't find a working example self.proxymodel.setSourceModel(self.model) self.FundamentalTabelle.setSortingEnabled(True) self.FundamentalTabelle.setModel(self.proxymodel)

Sub-classing QSortFilterProxyModel and overriding it's lessThan method seems to be the right way. But all examples I found, resulted in new problems.
I even would not know, which of those examples I should post here to start with. Perhaps if somebody could direct me to a "golden-sample". Thanks!
(btw: my table has columns with text and columns with floats ... would be great if sorting could work on both types).