Add example for deploy with revision

that deploys juju-qa-test --channel 2.0/stable --revision 22

Author: cderici

examples/deploywithrevision.py

@@ -0,0 +1,33 @@
+from juju import jasyncio
+from juju.model import Model
+
+
+async def main():
+    charm = 'juju-qa-test'
+
+    model = Model()
+    print('Connecting to model')
+    # connect to current model with current user, per Juju CLI
+    await model.connect()
+
+    try:
+        print(f'Deploying {charm} --channel 2.0/stable --revision 22')
+        application = await model.deploy(
+            'juju-qa-test',
+            application_name='test',
+            channel='2.0/stable',
+            revision=22,
+        )
+
+        print('Waiting for active')
+        await model.wait_for_idle(status='active')
+
+        print(f'Removing {charm}')
+        await application.remove()
+    finally:
+        print('Disconnecting from model')
+        await model.disconnect()
+
+
+if __name__ == '__main__':
+    jasyncio.run(main())