def calendar(self, title="<STR_LIT>", format_str="<STR_LIT>", date="<STR_LIT>", **kwargs):
return self._run_kdialog(title, ["<STR_LIT>", title], kwargs)<EOL>
Show a calendar dialog

Usage: C{dialog.calendar_dialog(title="Choose a date", format="%Y-%m-%d", date="YYYY-MM-DD", **kwargs)}

Note: the format and date parameters are not currently used

@param title: window title for the dialog
@param format_str: format of date to be returned
@param date: initial date as YYYY-MM-DD, otherwise today
@return: a tuple containing the exit code and date
@rtype: C{DialogData(int, str)}