[python] Add missing keywords python (#4134)

* Add missing keywords python

* Correct shell script names

* Revert "Correct shell script names"

This reverts commit 37f8fe5.

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PythonClientCodegen.java

@@ -127,7 +127,8 @@ 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", 
+                        "False", "async", "await"));
 
         regexModifiers = new HashMap<Character, String>();
         regexModifiers.put('i', "IGNORECASE");