Adds a PermissionService sample for Python

examples/palm/python/permissions/sharing.py

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+"""Sample functions illustrating how to share models using the permission service."""
+import google.generativeai as palm
+import google.ai.generativelanguage as glm
+from google.ai.generativelanguage_v1beta3 import types
+
+client_config = {
+    # Add any client config here, e.g. credentials=... for service accounts.
+}
+perm_client = glm.PermissionServiceClient(**client_config)
+
+# Listing existing permissions on a tuned model.
+model_name = 'tunedModels/...'
+list_response = perm_client.list_permissions(parent=model_name)
+print(list_response)
+
+# Sharing a model with another user (e.g. service account), or "adding a permission"
+new_user = "[email protected]"
+perm = types.Permission(
+    grantee_type=types.Permission.GranteeType.USER,
+    role=types.Permission.Role.READER,
+    email_address=new_user,
+)
+
+model_name = 'tunedModels/...'
+new_perm_response = perm_client.create_permission(permission=perm, parent=model_name)
+print(new_perm_response)