[python] always generate models with base init (#5517)

We have semi-complicated logic right now to determine whether we want to
generate inits on our DPG models. This is to clean up the logic

See
[this](https://teams.microsoft.com/l/message/19:b97d98e6d22c41e0970a1150b484d935@thread.skype/1736216580225?tenantId=72f988bf-86f1-41af-91ab-2d7cd011db47&groupId=3e17dcb0-4257-4a30-b843-77f47f1d4121&parentMessageId=1736216580225&teamName=Azure%20SDK&channelName=Language%20-%20Python&createdTime=1736216580225)
teams convo for more context.

---------

Co-authored-by: iscai-msft <isabellavcai@gmail.com>

.gitignore

@@ -225,3 +225,4 @@ BenchmarkDotnet.Artifacts/
 packages/http-client-python/generator/test/**/generated/
 packages/http-client-python/generator/test/**/cadl-ranch-coverage.json
 !packages/http-client-python/package-lock.json
+micropip.lock

packages/http-client-python/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Change Log - @typespec/http-client-python
 
+## 0.6.1
+
+### Bug Fixes
+
+- Generate `__init__` for all DPG models to ensure stability
+
 ## 0.6.0
 
 ### Features

packages/http-client-python/generator/pygen/codegen/serializers/model_serializer.py

@@ -116,7 +116,7 @@ def properties_to_pass_to_super(model: ModelType) -> str:
     def initialize_properties(self, model: ModelType) -> List[str]: ...
 
     def need_init(self, model: ModelType) -> bool:
-        return (not model.internal) and bool(self.init_line(model) or model.discriminator)
+        return bool(self.init_line(model) or model.discriminator)
 
     def pylint_disable_items(self, model: ModelType) -> List[str]:
         if model.flattened_property or self.initialize_properties(model):

packages/http-client-python/generator/test/azure/mock_api_tests/asynctests/test_azure_client_generator_core_access_async.py

@@ -92,7 +92,7 @@ async def test_operation(client: AccessClient):
 @pytest.mark.asyncio
 async def test_discriminator(client: AccessClient):
     result = await client.relative_model_in_operation._discriminator(kind="real")
-    assert result == models._models.RealModel(name="Madge", kind="real")
+    assert result == models._models.RealModel(name="Madge")
 
     with pytest.raises(ImportError):
         from specs.azure.clientgenerator.core.access.models import RealModel

packages/http-client-python/generator/test/azure/mock_api_tests/test_azure_client_generator_core_access.py

@@ -83,7 +83,7 @@ def test_operation(client: AccessClient):
 
 def test_discriminator(client: AccessClient):
     result = client.relative_model_in_operation._discriminator(kind="real")
-    assert result == models._models.RealModel(name="Madge", kind="real")
+    assert result == models._models.RealModel(name="Madge")
 
     with pytest.raises(ImportError):
         from specs.azure.clientgenerator.core.access.models import RealModel

packages/http-client-python/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@typespec/http-client-python",
-  "version": "0.6.0",
+  "version": "0.6.1",
   "author": "Microsoft Corporation",
   "description": "TypeSpec emitter for Python SDKs",
   "homepage": "https://typespec.io",