def onShortcutUnindentWithBackspace(self):
        """Backspace pressed, unindent
        """
        assert self._qpart.textBeforeCursor().endswith(self.text())

        charsToRemove = len(self._qpart.textBeforeCursor()) % len(self.text())
        if charsToRemove == 0:
            charsToRemove = len(self.text())

        cursor = self._qpart.textCursor()
        cursor.setPosition(cursor.position() - charsToRemove, QTextCursor.KeepAnchor)
        cursor.removeSelectedText()
def create_node(self, *args, **kwargs):
        nbparam = len(args) + len(kwargs)
        assert nbparam in (0, len(Fields)), \
            "Bad argument number for {}: {}, expecting {}".\
            format(Name, nbparam, len(Fields))
        self._fields = Fields
        self._attributes = Attributes
        for argname, argval in zip(self._fields, args):
            setattr(self, argname, argval)
        for argname, argval in kwargs.items():
            assert argname in Fields, \
                    "Invalid Keyword argument for {}: {}".format(Name, argname)
            setattr(self, argname, argval)