Fixes #22146. Fixed the code to call the correct method to prevent duplication of Prefix added to the model when using --model-name-prefix (#22188)

* Fixes #22146

* Added handling for when super.getSchemaType method
returns null

Author: Am-an-R

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

@@ -671,7 +671,13 @@ public String getTypeDeclaration(Schema p) {
             return getSchemaType(p) + "[str, " + getCollectionItemTypeDeclaration(inner) + "]";
         }
 
-        String openAPIType = getSchemaType(p);
+        String openAPIType = super.getSchemaType(p);
+        
+        if (openAPIType == null) {
+            LOGGER.error("OpenAPI Type for {} is null. Default to UNKNOWN_OPENAPI_TYPE instead.", p.getName());
+            openAPIType = "UNKNOWN_OPENAPI_TYPE";
+        }
+
         if (typeMapping.containsKey(openAPIType)) {
             return typeMapping.get(openAPIType);
         }