signFilter.py

def signFilter(poi):
        def getSignLineText(text):
                import json
                data = json.loads(text)
                if 'extra' in data:
                        return data['extra'][0]['text']
                else:
                        return data['text']
                return

        if poi['id'] == 'Sign' or poi['id'] == 'minecraft:sign':
                slist = list()
                for x in range(1, 5):
                        line = getSignLineText(poi['Text' + str(x)])
                        slist.append(line)

                return "\n".join(slist)