Update examples to match the new rewrite API.

examples/guessing_game.py

@@ -1,37 +1,32 @@
 import discord
 import random
 
-client = discord.Client()
+class MyClient(discord.Client):
+    async def on_ready(self):
+        print('Logged in as')
+        print(self.user.name)
+        print(self.user.id)
+        print('------')
 
-@client.event
-async def on_message(message):
-    # we do not want the bot to reply to itself
-    if message.author == client.user:
-        return
-
-    if message.content.startswith('$guess'):
-        await client.send_message(message.channel, 'Guess a number between 1 to 10')
-
-        def guess_check(m):
-            return m.content.isdigit()
-
-        guess = await client.wait_for_message(timeout=5.0, author=message.author, check=guess_check)
-        answer = random.randint(1, 10)
-        if guess is None:
-            fmt = 'Sorry, you took too long. It was {}.'
-            await client.send_message(message.channel, fmt.format(answer))
+    async def on_message(self, message):
+        # we do not want the bot to reply to itself
+        if message.author.id == self.user.id:
             return
-        if int(guess.content) == answer:
-            await client.send_message(message.channel, 'You are right!')
-        else:
-            await client.send_message(message.channel, 'Sorry. It is actually {}.'.format(answer))
 
+        if message.content.startswith('$guess'):
+            await message.channel.send('Guess a number between 1 and 10.')
+            check = lambda m: m.content.isdigit()
+            guess = await self.wait_for_message(author=message.author, check=check, timeout=5.0)
 
-@client.event
-async def on_ready():
-    print('Logged in as')
-    print(client.user.name)
-    print(client.user.id)
-    print('------')
+            answer = random.randint(1, 10)
+            if guess is not None:
+                await message.channel.send('Sorry, you took too long it was {}.'.format(answer))
+                return
 
+            if int(guess.content) == answer:
+                await message.channel.send('You are right!')
+            else:
+                await message.channel.send('Oops. It is actually {}.'.format(answer))
+
+client = MyClient()
 client.run('token')