Provide example of using peewee_async with Sanic

examples/sanic_peewee.py

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+## You need the following additional packages for this example
+# aiopg
+# peewee_async
+# peewee
+
+
+## sanic imports
+from sanic import Sanic
+from sanic.response import json
+
+## peewee_async related imports
+import uvloop
+import peewee
+from peewee_async import Manager, PostgresqlDatabase
+
+ # we instantiate a custom loop so we can pass it to our db manager
+loop = uvloop.new_event_loop()
+
+database = PostgresqlDatabase(database='test',
+                              host='127.0.0.1',
+                              user='postgres',
+                              password='mysecretpassword')
+
+objects = Manager(database, loop=loop)
+
+## from peewee_async docs:
+# Also there’s no need to connect and re-connect before executing async queries
+# with manager! It’s all automatic. But you can run Manager.connect() or
+# Manager.close() when you need it.
+
+
+# let's create a simple key value store:
+class KeyValue(peewee.Model):
+    key = peewee.CharField(max_length=40, unique=True)
+    text = peewee.TextField(default='')
+
+    class Meta:
+        database = database
+
+# create table synchronously
+KeyValue.create_table(True)
+
+# OPTIONAL: close synchronous connection
+database.close()
+
+# OPTIONAL: disable any future syncronous calls
+objects.database.allow_sync = False # this will raise AssertionError on ANY sync call
+
+
+app = Sanic('peewee_example')
+
+@app.route('/post')
+async def root(request):
+    await objects.create(KeyValue, key='my_first_async_db', text="I was inserted asynchronously!")
+    return json({'success': True})
+
+
+@app.route('/get')
+async def root(request):
+    all_objects = await objects.execute(KeyValue.select())
+    serialized_obj = []
+    for obj in all_objects:
+        serialized_obj.append({obj.key: obj.text})
+
+    return json({'objects': serialized_obj})
+
+
+if __name__ == "__main__":
+    app.run(host='0.0.0.0', port=8000, loop=loop)
+