copy properties from parent for python generator

Author: HugoMario

src/main/java/io/swagger/codegen/v3/generators/DefaultCodegenConfig.java

@@ -169,6 +169,7 @@ public abstract class DefaultCodegenConfig implements CodegenConfig {
 
     protected String ignoreFilePathOverride;
     protected boolean useOas2 = false;
+    protected boolean copyFistAllOfProperties = false;
 
     public List<CliOption> cliOptions() {
         return cliOptions;
@@ -1353,7 +1354,10 @@ else if (schema instanceof ComposedSchema) {
                 if (codegenModel.interfaces == null) {
                     codegenModel.interfaces = new ArrayList<String>();
                 }
-                for (int i = 1; i < allOf.size(); i++) {
+                for (int i = 0; i < allOf.size(); i++) {
+                    if (i == 0 && !copyFistAllOfProperties) {
+                        continue;
+                    }
                     Schema interfaceSchema = allOf.get(i);
                     if (StringUtils.isBlank(interfaceSchema.get$ref())) {
                         continue;

src/main/java/io/swagger/codegen/v3/generators/python/PythonClientCodegen.java

@@ -236,6 +236,8 @@ public void processOpts() {
         modelPackage = packageName + "." + modelPackage;
         apiPackage = packageName + "." + apiPackage;
 
+        copyFistAllOfProperties = true;
+
     }
 
     private static String dropDots(String str) {