diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/PythonClientCodegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/PythonClientCodegen.java
index a2960c512b56..6d9982cf78c0 100755
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/PythonClientCodegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/PythonClientCodegen.java
@@ -199,6 +199,8 @@ public class PythonClientCodegen extends DefaultCodegen implements CodegenConfig
 
     @Override
     public String toModelName(String name) {
+        name = sanitizeName(name);
+
         // model name cannot use reserved keyword, e.g. return
         if (reservedWords.contains(name)) {
             throw new RuntimeException(name + " (reserved word) cannot be used as a model name");
diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/RubyClientCodegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/RubyClientCodegen.java
index f608c4b8d0f3..4aac683b6ef8 100644
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/RubyClientCodegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/RubyClientCodegen.java
@@ -224,6 +224,8 @@ public class RubyClientCodegen extends DefaultCodegen implements CodegenConfig {
 
     @Override
     public String toModelName(String name) {
+        name = sanitizeName(name);
+
         // model name cannot use reserved keyword, e.g. return
         if (reservedWords.contains(name)) {
             throw new RuntimeException(name + " (reserved word) cannot be used as a model name");
diff --git a/samples/client/petstore/python/swagger_client/apis/user_api.py b/samples/client/petstore/python/swagger_client/apis/user_api.py
index 1c96e1e923ee..aa35e6db53aa 100644
--- a/samples/client/petstore/python/swagger_client/apis/user_api.py
+++ b/samples/client/petstore/python/swagger_client/apis/user_api.py
@@ -435,7 +435,7 @@ class UserApi(object):
 
         :param callback function: The callback function
             for asynchronous request. (optional)
-        :param str username: The name that needs to be fetched. Use user1 for testing.  (required)
+        :param str username: The name that needs to be fetched. Use user1 for testing. (required)
         :return: User
                  If the method is called asynchronously,
                  returns the request thread.