HYTOS

    def copy_selection(self, table_widget):

        """copy selected text to clipboard"""

        import io

        import csv

        selection = table_widget.selectedIndexes()

        if selection:

            rows = sorted(index.row() for index in selection)

            columns = sorted(index.column() for index in selection)

            rowcount = rows[-1] - rows[0] + 1

            colcount = columns[-1] - columns[0] + 1

            table = [[''] * colcount for _ in range(rowcount)]

            for index in selection:

                row = index.row() - rows[0]

                column = index.column() - columns[0]

                table[row][column] = index.data()

            stream = io.StringIO()

            csv.writer(stream, delimiter='\t').writerows(table)

            QApplication.clipboard().setText(stream.getvalue())

    def paste_selection(self, table_widget):

        """paste text of clipboard to table widget"""

        import io

        import csv

        selection = table_widget.selectedIndexes()

        if selection:

            model = table_widget.model()

            buffer = QApplication.clipboard().text()

            rows = sorted(index.row() for index in selection)

            columns = sorted(index.column() for index in selection)

            reader = csv.reader(io.StringIO(buffer), delimiter='\t')

            if len(rows) == 1 and len(columns) == 1:

                for i, line in enumerate(reader):

                    for j, cell in enumerate(line):

                        model.setData(model.index(rows[0] + i, columns[0] + j), cell)

            else:

                arr = [[cell for cell in row] for row in reader]

                for index in selection:

                    row = index.row() - rows[0]

                    column = index.column() - columns[0]

                    model.setData(model.index(index.row(), index.column()), arr[row][column])

                #    self.graphicsView.useDefaultCommand()

            elif (event.key() == Qt.Key_C) and (event.modifiers() & Qt.ControlModifier):

                if self.tableWidgetHMB.hasFocus():

                    self.copy_selection(self.tableWidgetHMB)

            elif (event.key() == Qt.Key_V) and (event.modifiers() & Qt.ControlModifier):

                if self.tableWidgetHMB.hasFocus():

                    self.paste_selection(self.tableWidgetHMB)