Added metar module

bot.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 import asyncio
 import os
 import json
@@ -44,6 +46,7 @@ class Bot:
             try:
                 await moduleobject.matrix_message(bot, room, event)
             except:
+                await self.send_text(room, f'Module {command} experienced difficulty: {sys.exc_info()[0]} - see log for details')
                 traceback.print_exc(file=sys.stderr)
 
     async def unknown_cb(self, room, event):

modules/echo.py

@@ -1,9 +1,9 @@
 class MatrixModule:
     def matrix_start(self, bot):
-        print("Echo start!")
+        print("Echo started.")
 
     def matrix_stop(self, bot):
-        print("Echo stop!")
+        print("Echo stopped")
 
     async def matrix_message(self, bot, room, event):
         args = event.body.split()

modules/metar.py

@@ -0,0 +1,18 @@
+import subprocess
+import os
+import urllib.request
+
+class MatrixModule:
+    async def matrix_message(self, bot, room, event):
+        args = event.body.split()
+        if len(args) == 2:
+            icao = args[1]
+            metar_url = "https://tgftp.nws.noaa.gov/data/observations/metar/stations/" + icao.upper() + ".TXT"
+            response = urllib.request.urlopen(metar_url)
+            lines = response.readlines()
+            await bot.send_text(room, lines[1].decode("utf-8").strip())
+        else:
+            await bot.send_text(room, 'Usage: !metar <icao code>')
+
+    def help(self):
+        return('Metar data access (usage: !metar <icao code>)')