diff --git a/modules/swagger-codegen/src/main/resources/python/rest.mustache b/modules/swagger-codegen/src/main/resources/python/rest.mustache
index 44a1022906b..e7051886dcd 100644
--- a/modules/swagger-codegen/src/main/resources/python/rest.mustache
+++ b/modules/swagger-codegen/src/main/resources/python/rest.mustache
@@ -1,4 +1,10 @@
 # coding: utf-8
+
+"""
+Credit: this file (rest.py) is modified based on rest.py in Dropbox Python SDK:
+https://www.dropbox.com/developers/core/sdks/python
+"""
+
 import sys
 import io
 import json