diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/FlaskConnexionCodegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/FlaskConnexionCodegen.java
old mode 100644
new mode 100755
index ebcfedbb7ce..612d7f37e89
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/FlaskConnexionCodegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/FlaskConnexionCodegen.java
@@ -78,7 +78,8 @@ public FlaskConnexionCodegen() {
                     "and", "del", "from", "not", "while", "as", "elif", "global", "or", "with",
                     "assert", "else", "if", "pass", "yield", "break", "except", "import",
                     "print", "class", "exec", "in", "raise", "continue", "finally", "is",
-                    "return", "def", "for", "lambda", "try", "self", "None", "True", "False", "nonlocal"));
+                    "return", "def", "for", "lambda", "try", "self", "None", "True", "False", "nonlocal",
+                    "float", "int", "str", "date", "datetime"));
 
         // set the output folder here
         outputFolder = "generated-code/connexion";
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 6d7015cda3f..bc5e4c994ac 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
@@ -107,7 +107,8 @@ public PythonClientCodegen() {
                     "and", "del", "from", "not", "while", "as", "elif", "global", "or", "with",
                     "assert", "else", "if", "pass", "yield", "break", "except", "import",
                     "print", "class", "exec", "in", "raise", "continue", "finally", "is",
-                    "return", "def", "for", "lambda", "try", "self", "nonlocal", "None", "True", "False"));
+                    "return", "def", "for", "lambda", "try", "self", "nonlocal", "None", "True", "nonlocal",
+                    "float", "int", "str", "date", "datetime"));
 
         regexModifiers = new HashMap<Character, String>();
         regexModifiers.put('i', "IGNORECASE");