How to use the bypy.const.EArgument function in bypy

self.pd("File info json: {}".format(self.__remote_json))
			return const.ENoError

		rdir, rfile = posixpath.split(remotefile)
		self.pd("__get_file_info(): rdir : {} | rfile: {}".format(rdir, rfile))
		if rdir and rfile:
			pars = {
				'method' : 'list',
				'path' : rdir,
				'by' : 'name', # sort in case we can use binary-search, etc in the futrue.
				'order' : 'asc' }

			return self.__get(pcsurl + 'file', pars, self.__get_file_info_act, remotefile, **kwargs)
		else:
			perr("Invalid remotefile '{}' specified.".format(remotefile))
			return const.EArgument

def __multi_process(self, worker, iterator, process = "dl / ul"):
		if not self.__check_prompt_multiprocess():
			return const.EArgument
		self.__warn_multi_processes(process)
		# patch the printer
		restoremp = set_mp_print()
		with UPool(self.processes) as pool:
			try:
				# http://stackoverflow.com/a/35134329/404271
				# On Python 2.x, Ctrl-C won't work if we use pool.map(), wait() or get()
				ar = pool.map_async(worker, iterator)
				#results = ar.get(const.TenYearInSeconds)
				results = ar.get(const.FortyNineDaysInSeconds)
				restoremp()
				return self.__filter_multi_results(results)
			except pickle.PicklingError as pe:
				errmsg = ("Exception:\n{}\n"
						"--------------------------------\n"
						"Error: Your Python 'multiprocess' library is probably "

if args[0].upper() == 'L':
				try:
					with io.open(args[1:], 'r', encoding = 'utf-8') as f:
						contents = f.read()
						digests = filter(None, contents.split())
						for d in digests:
							self.__slice_md5s.append(d)
				except IOError as ex:
					perr("Exception occured while reading file '{}'.\n{}".format(
						localfile, formatex(ex)))
			else:
				for arg in args:
					self.__slice_md5s.append(arg)
		else:
			perr("You MUST provide the MD5s hex strings through arguments or a file.")
			return const.EArgument

		original_verify = self.__verify
		if not localfile or localfile == '*' or localfile == '/dev/null':
			self.__current_file = '/dev/null' # Force no verify
			self.__verify = False
		else:
			self.__current_file = localfile
			self.__current_file_size = getfilesize(localfile)

		result = self.__combine_file(get_pcs_path(remotefile))
		self.__verify = original_verify
		return result