[python] remove reserved word padding for enum values

.chronus/changes/python-removeEnumPadding-2026-1-27-12-23-22.md

@@ -0,0 +1,7 @@
+---
+changeKind: feature
+packages:
+  - "@typespec/http-client-python"
+---
+
+Remove enum value padding because we generate our enum value names with upper case so there is no need

packages/http-client-python/generator/pygen/preprocess/__init__.py

@@ -21,7 +21,6 @@
     get_body_type_for_description,
     JSON_REGEXP,
     KNOWN_TYPES,
-    update_enum_value,
 )
 
 
@@ -272,25 +271,12 @@ def update_types(self, yaml_data: list[dict[str, Any]]) -> None:
                 type["description"] = update_description(type.get("description", ""), type["name"])
                 type["snakeCaseName"] = to_snake_case(type["name"])
             if type.get("values"):
-                # we're enums
-                values_to_add = []
+                # we're enums - enum values are UPPER_CASE so no padding needed for reserved words
                 for value in type["values"]:
-                    padded_name = self.pad_reserved_words(value["name"].lower(), PadType.ENUM_VALUE, value).upper()
-                    if self.version_tolerant:
-                        if padded_name[0] in "0123456789":
-                            padded_name = "ENUM_" + padded_name
-                            value["name"] = padded_name
-                    else:
-                        if value["name"] != padded_name:
-                            values_to_add.append(
-                                update_enum_value(
-                                    name=padded_name,
-                                    value=value["value"],
-                                    description=value["description"],
-                                    enum_type=value["enumType"],
-                                )
-                            )
-                type["values"].extend(values_to_add)
+                    upper_name = value["name"].upper()
+                    if upper_name[0] in "0123456789":
+                        upper_name = "ENUM_" + upper_name
+                        value["name"] = upper_name
 
         # add type for reference
         for v in HEADERS_CONVERT_IN_METHOD.values():

packages/http-client-python/generator/pygen/preprocess/python_mappings.py

@@ -56,7 +56,6 @@ class PadType(str, Enum):
     ENUM_CLASS = "Enum"
     METHOD = "_method"
     PARAMETER = "_parameter"
-    ENUM_VALUE = "_enum"
     PROPERTY = "_property"
     OPERATION_GROUP = "Operations"
 
@@ -183,7 +182,6 @@ class PadType(str, Enum):
     PadType.MODEL: ["enum", *_always_reserved],
     PadType.PROPERTY: ["self", *_always_reserved],
     PadType.ENUM_CLASS: ["enum", *_always_reserved],
-    PadType.ENUM_VALUE: ["mro", *_always_reserved],
     PadType.OPERATION_GROUP: [*_always_reserved],
 }
 

packages/http-client-python/generator/test/unittests/test_name_converter.py

@@ -34,10 +34,3 @@ def test_escaped_reserved_words():
     for name in expected_conversion_parameter:
         assert pad_reserved_words(name, pad_type=PadType.PARAMETER) == expected_conversion_parameter[name]
 
-    expected_conversion_enum = {
-        "self": "self",
-        "mro": "mro_enum",
-        "continuation_token": "continuation_token",
-    }
-    for name in expected_conversion_enum:
-        assert pad_reserved_words(name, pad_type=PadType.ENUM_VALUE) == expected_conversion_enum[name]