Python server implementation for grpc-python-golang example

server.py

from nltk_service_pb2 import *
from nltk_service_pb2_grpc import *

import grpc
import nltk
from concurrent import futures
from nltk.corpus import stopwords

class NltkService(KeywordServiceServicer):

    def __init__(self):
        self.stopwords = stopwords.words('english')
        self.trans_table = str.maketrans("", "", "[]()-,|/\\\"?:;&%$#@!%^.") # Remove these symbols from keywords

    def keywords(self, words):
        # We are removing all the stopwords and removing all other characters
        return [word.translate(self.trans_table) for word in words if word not in self.stopwords]

    def GetKeywords(self, request, context):
        # Text we got from the client
        text = request.text.lower()
        text = text.replace('\n', '').replace('\r', '')
        words = text.split(' ')

        keywords = self.keywords(words)

        response = Response()
        response.keywords.extend(keywords)

        return response