diff --git a/modules/swagger-codegen/src/main/resources/python/README.mustache b/modules/swagger-codegen/src/main/resources/python/README.mustache
index 9f592946b061..9f432447443f 100644
--- a/modules/swagger-codegen/src/main/resources/python/README.mustache
+++ b/modules/swagger-codegen/src/main/resources/python/README.mustache
@@ -70,7 +70,7 @@ from pprint import pprint
 {{{packageName}}}.configuration.access_token = 'YOUR_ACCESS_TOKEN'{{/isOAuth}}{{/authMethods}}
 {{/hasAuthMethods}}
 # create an instance of the API class
-api_instance = {{{packageName}}}.{{{classname}}}
+api_instance = {{{packageName}}}.{{{classname}}}()
 {{#allParams}}{{paramName}} = {{{example}}} # {{{dataType}}} | {{{description}}}{{^required}} (optional){{/required}}{{#defaultValue}} (default to {{{.}}}){{/defaultValue}}
 {{/allParams}}
 
diff --git a/samples/client/petstore/python/README.md b/samples/client/petstore/python/README.md
index ec654c5190e6..7b29cebd5347 100644
--- a/samples/client/petstore/python/README.md
+++ b/samples/client/petstore/python/README.md
@@ -51,7 +51,7 @@ import petstore_api
 from petstore_api.rest import ApiException
 from pprint import pprint
 # create an instance of the API class
-api_instance = petstore_api.FakeApi
+api_instance = petstore_api.FakeApi()
 body = petstore_api.Client() # Client | client model
 
 try: