add example code generator

openapi_templete/test/project/client.py

@@ -0,0 +1,18 @@
+# 1
+import paho.mqtt.client as mqtt
+# 2
+mqttBroker = "test.mosquitto.org"
+
+class TemperatureServiceClient:
+    def __init__(self):
+      # 3
+        self.client = mqtt.Client()
+      # 4
+        self.client.connect(mqttBroker)
+
+
+    def sendTemperatureChange(self, id):
+      # 5
+        topic = "temperature/changed"
+      # 6
+        self.client.publish(topic, id)