[Python] deserialize enum json response (fix OpenAPITools#17789) (OpenAPITools#17791)

* deserialize enum json response (python)

* adapt python samples: adding enum deserialization

* add echo test for enum json response deserialization (python)

* update samples

Author: joeka

modules/openapi-generator/src/main/resources/python/api_client.mustache

@@ -4,6 +4,7 @@
 
 import datetime
 from dateutil.parser import parse
+from enum import Enum
 import json
 import mimetypes
 import os
@@ -437,6 +438,8 @@ class ApiClient:
             return self.__deserialize_date(data)
         elif klass == datetime.datetime:
             return self.__deserialize_datetime(data)
+        elif issubclass(klass, Enum):
+            return self.__deserialize_enum(data, klass)
         else:
             return self.__deserialize_model(data, klass)
 
@@ -743,6 +746,24 @@ class ApiClient:
                 )
             )
 
+    def __deserialize_enum(self, data, klass):
+        """Deserializes primitive type to enum.
+
+        :param data: primitive type.
+        :param klass: class literal.
+        :return: enum value.
+        """
+        try:
+            return klass(data)
+        except ValueError:
+            raise rest.ApiException(
+                status=0,
+                reason=(
+                    "Failed to parse `{0}` as `{1}`"
+                    .format(data, klass)
+                )
+            )
+
     def __deserialize_model(self, data, klass):
         """Deserializes list or dict to model.
 

modules/openapi-generator/src/test/resources/3_0/echo_api.yaml

@@ -544,6 +544,26 @@ paths:
             text/plain:
               schema:
                 type: string
+  /echo/body/string_enum:
+    post:
+      tags:
+        - body
+      summary: Test string enum response body
+      description: Test string enum response body
+      operationId: test/echo/body/string_enum
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/StringEnumRef'
+        description: String enum
+      responses:
+        '200':
+          description: Successful operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/StringEnumRef'
   /binary/gif:
     post:
       tags:

samples/client/echo_api/csharp-restsharp/README.md

@@ -126,6 +126,7 @@ Class | Method | HTTP request | Description
 *BodyApi* | [**TestEchoBodyFreeFormObjectResponseString**](docs/BodyApi.md#testechobodyfreeformobjectresponsestring) | **POST** /echo/body/FreeFormObject/response_string | Test free form object
 *BodyApi* | [**TestEchoBodyPet**](docs/BodyApi.md#testechobodypet) | **POST** /echo/body/Pet | Test body parameter(s)
 *BodyApi* | [**TestEchoBodyPetResponseString**](docs/BodyApi.md#testechobodypetresponsestring) | **POST** /echo/body/Pet/response_string | Test empty response body
+*BodyApi* | [**TestEchoBodyStringEnum**](docs/BodyApi.md#testechobodystringenum) | **POST** /echo/body/string_enum | Test string enum response body
 *BodyApi* | [**TestEchoBodyTagResponseString**](docs/BodyApi.md#testechobodytagresponsestring) | **POST** /echo/body/Tag/response_string | Test empty json (request body)
 *FormApi* | [**TestFormIntegerBooleanString**](docs/FormApi.md#testformintegerbooleanstring) | **POST** /form/integer/boolean/string | Test form parameter(s)
 *FormApi* | [**TestFormOneof**](docs/FormApi.md#testformoneof) | **POST** /form/oneof | Test form parameter(s) for oneOf schema

samples/client/echo_api/csharp-restsharp/api/openapi.yaml

@@ -519,6 +519,26 @@ paths:
       summary: Test free form object
       tags:
       - body
+  /echo/body/string_enum:
+    post:
+      description: Test string enum response body
+      operationId: test/echo/body/string_enum
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/StringEnumRef'
+        description: String enum
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/StringEnumRef'
+          description: Successful operation
+      summary: Test string enum response body
+      tags:
+      - body
   /binary/gif:
     post:
       description: Test binary (gif) response body

samples/client/echo_api/csharp-restsharp/docs/BodyApi.md

@@ -12,6 +12,7 @@ All URIs are relative to *http://localhost:3000*
 | [**TestEchoBodyFreeFormObjectResponseString**](BodyApi.md#testechobodyfreeformobjectresponsestring) | **POST** /echo/body/FreeFormObject/response_string | Test free form object |
 | [**TestEchoBodyPet**](BodyApi.md#testechobodypet) | **POST** /echo/body/Pet | Test body parameter(s) |
 | [**TestEchoBodyPetResponseString**](BodyApi.md#testechobodypetresponsestring) | **POST** /echo/body/Pet/response_string | Test empty response body |
+| [**TestEchoBodyStringEnum**](BodyApi.md#testechobodystringenum) | **POST** /echo/body/string_enum | Test string enum response body |
 | [**TestEchoBodyTagResponseString**](BodyApi.md#testechobodytagresponsestring) | **POST** /echo/body/Tag/response_string | Test empty json (request body) |
 
 <a id="testbinarygif"></a>
@@ -730,6 +731,97 @@ No authorization required
  - **Accept**: text/plain
 
 
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+<a id="testechobodystringenum"></a>
+# **TestEchoBodyStringEnum**
+> StringEnumRef TestEchoBodyStringEnum (string? body = null)
+
+Test string enum response body
+
+Test string enum response body
+
+### Example
+```csharp
+using System.Collections.Generic;
+using System.Diagnostics;
+using Org.OpenAPITools.Api;
+using Org.OpenAPITools.Client;
+using Org.OpenAPITools.Model;
+
+namespace Example
+{
+    public class TestEchoBodyStringEnumExample
+    {
+        public static void Main()
+        {
+            Configuration config = new Configuration();
+            config.BasePath = "http://localhost:3000";
+            var apiInstance = new BodyApi(config);
+            var body = null;  // string? | String enum (optional) 
+
+            try
+            {
+                // Test string enum response body
+                StringEnumRef result = apiInstance.TestEchoBodyStringEnum(body);
+                Debug.WriteLine(result);
+            }
+            catch (ApiException  e)
+            {
+                Debug.Print("Exception when calling BodyApi.TestEchoBodyStringEnum: " + e.Message);
+                Debug.Print("Status Code: " + e.ErrorCode);
+                Debug.Print(e.StackTrace);
+            }
+        }
+    }
+}
+```
+
+#### Using the TestEchoBodyStringEnumWithHttpInfo variant
+This returns an ApiResponse object which contains the response data, status code and headers.
+
+```csharp
+try
+{
+    // Test string enum response body
+    ApiResponse<StringEnumRef> response = apiInstance.TestEchoBodyStringEnumWithHttpInfo(body);
+    Debug.Write("Status Code: " + response.StatusCode);
+    Debug.Write("Response Headers: " + response.Headers);
+    Debug.Write("Response Body: " + response.Data);
+}
+catch (ApiException e)
+{
+    Debug.Print("Exception when calling BodyApi.TestEchoBodyStringEnumWithHttpInfo: " + e.Message);
+    Debug.Print("Status Code: " + e.ErrorCode);
+    Debug.Print(e.StackTrace);
+}
+```
+
+### Parameters
+
+| Name | Type | Description | Notes |
+|------|------|-------------|-------|
+| **body** | **string?** | String enum | [optional]  |
+
+### Return type
+
+[**StringEnumRef**](StringEnumRef.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **Accept**: application/json
+
+
 ### HTTP response details
 | Status code | Description | Response headers |
 |-------------|-------------|------------------|