Class for obtaining list of upcoming, completed, and current recordings from TVHeadend web api

tvhRecordings.py

#!/usr/bin/python

import urllib2, json

class TVHeadend:
    def __init__(self, host, port):
        self.url = 'http://' + host + ':' + port

    def GetRunning(self):
        url = '/api/dvr/entry/grid_upcoming'
        data = self.__RequestData(url)['entries']
        return self.__ProcessData(data, 'Running')

    def GetUpcoming(self):
        url = '/api/dvr/entry/grid_upcoming'
        data = self.__RequestData(url)['entries']
        return self.__ProcessData(data, 'Upcoming')

    def GetCompleted(self):
        url = '/api/dvr/entry/grid_finished'
        data = self.__RequestData(url)['entries']
        return self.__ProcessData(data, 'Completed')

    def __ProcessData(self, data, method):
        if data == None: return []
        return_list = []
        for item in data:
            if method == 'Upcoming' and item['status'] != 'Running':
                return_list.append(item)
            if method == 'Running' and item['status'] == 'Running':
                return_list.append(item)
            if method == 'Completed':
                return_list = data
                break
        return_list = sorted(return_list, key=lambda k: k['start'])
        return return_list

    def __RequestData(self, url):
        url = self.url + url
        response = urllib2.urlopen(url)
        data = json.loads(response.read())
        return data