[python] fix typing for API responses (#16802)

* [python] remove _preload_content

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] remove _return_http_data_only

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] remove async_req

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] fix typing for API responses

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] update samples

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] fix AttributeError

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] remove _preload_content

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] fix response_type

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] fix typo

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] update simplify RESTClientObject

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] update split call_api into 4 functions

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] update samples

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] update improve stream

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] remove kwargs

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] update ApiResponse

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] add method for each return value

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] update test

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] update samples

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] update docs

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] add constantParams

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] fix ImportError

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] fix SyntaxError in RESTResponse

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] add ApiResponse model_config

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] fix when isBinary is str

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] update type

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] update samples

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] add rest with pydantic v1

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] update format

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] update format and type

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] add test

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] update type to pydantic strict type

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] remove leftover files

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] remove descriptions per field

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] add test

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] fix test

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] fix test

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] remove multiprocessing

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] update samples

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] add blank line to docstring

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] update docstring

Signed-off-by: ふぁ <yuki@yuki0311.com>

* [python] remove unwanted imports in rest

Signed-off-by: ふぁ <yuki@yuki0311.com>

---------

Signed-off-by: ふぁ <yuki@yuki0311.com>

samples/client/echo_api/python/openapi_client/exceptions.py

@@ -106,7 +106,7 @@ class ApiException(OpenApiException):
         if http_resp:
             self.status = http_resp.status
             self.reason = http_resp.reason
-            self.body = http_resp.data
+            self.body = http_resp.data.decode('utf-8')
             self.headers = http_resp.getheaders()
         else:
             self.status = status