Returns a new dialect that implements the current selection

def get_dialect(self):
        """Returns a new dialect that implements the current selection"""

        parameters = {}

        for parameter in self.csv_params[2:]:
            pname, ptype, plabel, phelp = parameter

            widget = self._widget_from_p(pname, ptype)

            if ptype is types.StringType or ptype is types.UnicodeType:
                parameters[pname] = str(widget.GetValue())
            elif ptype is types.BooleanType:
                parameters[pname] = widget.GetValue()
            elif pname == 'quoting':
                choice = self.choices['quoting'][widget.GetSelection()]
                parameters[pname] = getattr(csv, choice)
            else:
                raise TypeError(_("{type} unknown.").format(type=ptype))

        has_header = parameters.pop("self.has_header")

        try:
            csv.register_dialect('user', **parameters)

        except TypeError, err:
            msg = _("The dialect is invalid. \n "
                    "\nError message:\n{msg}").format(msg=err)
            dlg = wx.MessageDialog(self.parent, msg, style=wx.ID_CANCEL)
            dlg.ShowModal()
            dlg.Destroy()
            raise TypeError(err)

        return csv.get_dialect('user'), has_header