Fix python example list (#8877)

* Fix python example list

Closing char was missing.

* Add sample, and fix generation for sample not to show up

* Add test of example generation

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

@@ -1085,13 +1085,13 @@ public class PythonClientCodegen extends PythonLegacyClientCodegen {
             }
             return fullPrefix + example + closeChars;
         } else if (ModelUtils.isArraySchema(schema)) {
-            if (objExample instanceof Iterable) {
-                // If the example is already a list, return it directly instead of wrongly wrap it in another list
-                return fullPrefix + objExample.toString();
-            }
             ArraySchema arrayschema = (ArraySchema) schema;
             Schema itemSchema = arrayschema.getItems();
             String itemModelName = getModelName(itemSchema);
+            if (objExample instanceof Iterable && itemModelName == null) {
+                // If the example is already a list, return it directly instead of wrongly wrap it in another list
+                return fullPrefix + objExample.toString() + closeChars;
+            }
             seenSchemas.add(schema);
             example = fullPrefix + "[" + "\n" + toExampleValueRecursive(itemModelName, itemSchema, objExample, indentationLevel + 1, "", exampleLine + 1, seenSchemas) + ",\n" + closingIndentation + "]" + closeChars;
             return example;

modules/openapi-generator/src/test/java/org/openapitools/codegen/python/PythonClientTest.java

@@ -39,7 +39,9 @@ import java.io.File;
 import java.math.BigDecimal;
 import java.nio.file.Files;
 import java.util.Arrays;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
 import org.openapitools.codegen.*;
 import org.openapitools.codegen.languages.PythonClientCodegen;
@@ -290,8 +292,9 @@ public class PythonClientTest {
     // should not start with 'null'. need help from the community to investigate further
     @Test(description = "convert an array model")
     public void arrayModelTest() {
-        final DefaultCodegen codegen = new PythonClientCodegen();
+        final PythonClientCodegen codegen = new PythonClientCodegen();
         OpenAPI openAPI = TestUtils.createOpenAPI();
+
         final Schema model = new ArraySchema()
                 .items(new Schema().$ref("#/components/schemas/Children"))
                 .description("an array model");
@@ -312,6 +315,12 @@ public class PythonClientTest {
         Assert.assertEquals(cm.parent, "list");
         Assert.assertEquals(cm.imports.size(), 1);
         Assert.assertEquals(Sets.intersection(cm.imports, Sets.newHashSet("Children")).size(), 1);
+
+        final Map<String, Integer> childExample = new HashMap<>();
+        childExample.put("number", 3);
+        final List<Map<String, Integer>> example =  Arrays.asList(childExample);
+        String exampleValue = codegen.toExampleValue(model, example);
+        Assert.assertEquals("[Children(number=1,),]", exampleValue.replaceAll("\\s+",""));
     }
 
     // should not start with 'null'. need help from the community to investigate further

modules/openapi-generator/src/test/resources/3_0/python/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml

@@ -880,6 +880,15 @@ paths:
           application/json:
             schema:
               $ref: '#/components/schemas/AnimalFarm'
+            examples:
+              simple-list:
+                 summary: Simple list example
+                 description: Should not get into code examples
+                 value:
+                    - className: foo
+                      color: yellow
+                    - className: bar
+                      color: green
         required: false
       responses:
         '200':