How to use Python in Katalon Studio

hi,

i did some changes to PythonKeywords script, now it’s return valu(s) to testscript

			def retval = []
			def input = new BufferedReader(new InputStreamReader(process.getInputStream()))
			while ((line = input.readLine()) != null) {
				KeywordUtil.logInfo(line)
				**retval.add(line)**
			}
			input.close()
			return retval