Externalized processing of requests to another method

Now it is easier to get the finished messages and send it if no reply is
possible

bot.py

@@ -40,30 +40,38 @@ def search_station(query):
         return request.json()[0]['stationId']
 
 
-def get_vvs_departures(update, context):
-    if len(context.args) == 0:
-        update.message.reply_text("No argument specified")
-        return
-    query = Query(context.args)
+def handle_vvs(update, context):
+    for reply in get_vvs_departures(context.args):
+        update.message.reply_text(reply)
+
+
+def get_vvs_departures(args):
+    reply = []
+    if len(args) == 0:
+        reply.append("No argument specified")
+        return reply
+    query = Query(args)
     if query.station_id == -1:
-        update.message.reply_text("No station matching this name found!")
-        return
+        reply.append("No station matching this name found!")
+        return reply
     request = requests.get("https://efa-api.asw.io/api/v1/station/" + query.station_id + "/departures")
     if request.status_code != 200:
-        update.message.reply_text("Error with server communication")
-    update.message.reply_text("Next departures:")
+        reply.append("Error with server communication")
+        return reply
+    reply.append("Next departures:")
     printed_departures = 0
     for station in request.json():
         if station['direction'].casefold().find(query.destination) != -1 or station['direction'].find(
                 query.destination) != -1:
             if query.line == '' or (query.line != -1 and station['number'] == query.line):
-                update.message.reply_text(
+                reply.append(
                     "Line " + station['number'] + " to \"" + station['direction'] + "\" at "
                     + station['departureTime']['hour'].zfill(2) + ':' + station['departureTime']['minute'].zfill(2)
                     + " +" + str(station['delay']))
                 printed_departures += 1
         if printed_departures >= query.departure_count:
             break
+    return reply
 
 
 def inline_station_search(update, context):
@@ -91,7 +99,7 @@ inline_station_search_handler = InlineQueryHandler(inline_station_search)
 
 dispatcher.add_handler(inline_station_search_handler)
 
-updater.dispatcher.add_handler(CommandHandler('vvs', get_vvs_departures))
+updater.dispatcher.add_handler(CommandHandler('vvs', handle_vvs))
 
 updater.start_polling()
 updater.idle()