add sample for python v2 model (#803)

Author: lucyzhang929

samples/samples-python-v2/function_app.py

@@ -2,6 +2,7 @@
 # Licensed under the MIT License.
 
 import json
+import logging
 import azure.functions as func
 from azure.functions.decorators.core import DataType
 
@@ -49,3 +50,13 @@ def add_product(req: func.HttpRequest, product: func.Out[func.SqlRow]) -> func.H
         status_code=201,
         mimetype="application/json"
     )
+
+# The function gets triggered when a change (Insert, Update, or Delete)
+# is made to the Products table.
+@app.function_name(name="ProductsTrigger")
+@app.generic_trigger(arg_name="products", type="sqlTrigger",
+                        TableName="Products",
+                        ConnectionStringSetting="SqlConnectionString",
+                        data_type=DataType.STRING)
+def products_trigger(products: str) -> None:
+    logging.info("SQL Changes: %s", json.loads(products))