old_contents: __author__ = 'reisuke'
  
  from flask import Flask
  from flask_restful import Resource, Api, reqparse
  import base64
  import numpy as np
  import cv2
  from sys import argv
  
  app = Flask(__name__)
  api = Api(app)
  
  
  class ImageConvert(Resource):
      def __init__(self):
          self.parser = reqparse.RequestParser()
          self.parser.add_argument('data', type=str, required=True)
          self.parser.add_argument('format', type=str, required=True)
          self.container = {}
          super(ImageConvert, self).__init__()
  
      def post(self):
          args = self.parser.parse_args()
          for key, value in args.items():
              self.container[key] = value
  
          self.container['data'] = base64.b64decode(self.container['data'])
          grayscaled = self.to_grayscale(self.container['data'], self.container['format'])
  
          return {'result': grayscaled}
  
      def to_grayscale(self, bytes_string, file_format):
          """to_grayscale(string, string) => string
  
          Description:
          Convert RGB image bytes string to grayscale image bytes string.
          To use this function, argument must be an image bytes string
          and file format in string.
  
          Returns a base64-encoded converted image bytes string.
          """
          numpy_array = np.fromstring(bytes_string, np.uint8)
          image_numpy = cv2.imdecode(numpy_array, cv2.CV_LOAD_IMAGE_COLOR)
          convert = cv2.cvtColor(image_numpy, cv2.COLOR_BGR2GRAY)
  
          result = cv2.imencode(file_format, convert)[1].tostring()
          return base64.b64encode(result)
  
  api.add_resource(ImageConvert, '/api/imageconverter/v0.1/', endpoint='v0.1')
  
  
  if __name__ == '__main__':
      argument = argv[1:]
      if len(argument) != 1:
          print "Usage: python app.py [hostname]:[port]"
          print "Example: python app.py localhost:9000"
          exit(2)
  
      hostname, port = argument[0].split(':')
      app.run(host=hostname, port=port, debug=True)
new_contents: __author__ = 'reisuke'
  
  from flask import Flask
  from flask_restful import Resource, Api, reqparse
  import base64
  import numpy as np
  import cv2
  from sys import argv
  
  app = Flask(__name__)
  api = Api(app)
  
  
  class ImageConvert(Resource):
      def __init__(self):
          self.parser = reqparse.RequestParser()
          self.parser.add_argument('data', type=str, required=True)
          self.parser.add_argument('format', type=str, required=True)
          self.container = {}
          super(ImageConvert, self).__init__()
  
      def post(self):
          args = self.parser.parse_args()
          for key, value in args.items():
              self.container[key] = value
  
          self.container['data'] = base64.b64decode(self.container['data'])
          grayscaled = self.to_grayscale(self.container['data'], self.container['format'])
  
          return {'result': grayscaled}
  
      def to_grayscale(self, bytes_string, file_format):
          """to_grayscale(string, string) => string
  
          Description:
          Convert RGB image bytes string to grayscale image bytes string.
          To use this function, argument must be an image bytes string
          and file format in string.
  
          Returns a base64-encoded converted image bytes string.
          """
          numpy_array = np.fromstring(bytes_string, np.uint8)
          image_numpy = cv2.imdecode(numpy_array, cv2.CV_LOAD_IMAGE_COLOR)
          convert = cv2.cvtColor(image_numpy, cv2.COLOR_BGR2GRAY)
  
          result = cv2.imencode(file_format, convert)[1].tostring()
          return base64.b64encode(result)
  
  api.add_resource(ImageConvert, '/api/imageconverter/v0.1/', endpoint='v0.1')
  
  
  if __name__ == '__main__':
      argument = argv[1:]
      if len(argument) != 1:
          print "Usage: python app.py [hostname]:[port]"
          print "Example: python app.py localhost:9000"
          exit(2)
  
      hostname, port = argument[0].split(':')
      app.run(host=hostname, port=int(port), debug=True)
subject: convert port into int