parser function

def parser(self,command):
        errorHandler=True;
        commandA=command.split(' ');
        parse = argparse.ArgumentParser(description='Argument parser');
        while switch(commandA[0]):
            if case('scan'):
                parse.add_argument('--qvw',  action='append_const', const=str, help='path to qlikview file with name');
                parse.add_argument('--xlsx', action='append_const', const=str, help='path to xlsx file with name');
                args=parse.parse_args();
                break;
            if case('example'):
                parse.add_argument('--name', type=str, help='file name');
                args=parse.parse_args();
                break;
            if case('change'):
                parse.add_argument('--qvw', type=str, help='path to qlikview file with name');
                parse.add_argument('--xlsx', type=str, help='path to xlsx file with name');
                args=parse.parse_args();
                break;
            errorHandler=False;
            break;
        if(errorHandler!=False):
            return args;
        else:
            return errorHandler;