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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def data(self, index, role):

 """Get the information of the levels."""

        if not index.isValid():
            return None
        if role == Qt.FontRole:
            return self._font
        label = ''
        if index.column() == self.model.header_shape[1] - 1:
            label = str(self.model.name(0, index.row()))
        elif index.row() == self.model.header_shape[0] - 1:
            label = str(self.model.name(1, index.column()))
        if role == Qt.DisplayRole and label:
            return label
        elif role == Qt.ForegroundRole:
            return self._foreground
        elif role == Qt.BackgroundRole:
            return self._background
        elif role == Qt.BackgroundRole:
            return self._palette.window()
        return None