Update policies.py

Author: sampleworthy

python/policies.py

@@ -10,13 +10,14 @@
 # Path to the policies.xml file
 policy_file_path = './policies/policies.xml'
 
-# Construct the command to create the product policy in APIM
+# Construct the command to update the product policy in APIM
 command = [
-    'az', 'apim', 'product', 'policy', 'create',
+    'az', 'apim', 'product', 'policy', 'update',
     '--resource-group', resourceGroupName,
     '--service-name', apimServiceName,
     '--product-id', product_id,
     '--xml-policy', policy_file_path,
+    '--set', 'format=xml',
 ]
 
 # Run the command