Fix type alias with Python 3.8

See https://bugs.python.org/issue45117

Author: ericbn

aws_lambda_powertools/event_handler/openapi/models.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from enum import Enum
-from typing import Any, Literal
+from typing import Any, Literal, Union
 
 from pydantic import AnyUrl, BaseModel, Field
 
@@ -181,7 +181,7 @@ class Schema(BaseModel):
 
 # Ref: https://json-schema.org/draft/2020-12/json-schema-core.html#name-json-schema-documents
 # A JSON Schema MUST be an object or a boolean.
-SchemaOrBool = Schema | bool
+SchemaOrBool = Union[Schema, bool]
 
 
 # https://swagger.io/specification/#example-object
@@ -408,7 +408,7 @@ class OpenIdConnect(SecurityBase):
     openIdConnectUrl: str
 
 
-SecurityScheme = APIKey | HTTPBase | OAuth2 | OpenIdConnect | HTTPBearer
+SecurityScheme = Union[APIKey, HTTPBase, OAuth2, OpenIdConnect, HTTPBearer]
 
 
 # https://swagger.io/specification/#components-object

aws_lambda_powertools/event_handler/openapi/types.py

@@ -2,17 +2,15 @@
 
 import types
 from enum import Enum
-from typing import TYPE_CHECKING, Any, Callable, TypedDict, Union
+from typing import Any, Callable, Dict, Set, TypedDict, Union
 
+from pydantic import BaseModel
 from typing_extensions import NotRequired
 
-if TYPE_CHECKING:
-    from pydantic import BaseModel
-
-CacheKey = Callable[..., Any] | None
-IncEx = set[int] | set[str] | dict[int, Any] | dict[str, Any]
-TypeModelOrEnum = type[BaseModel] | type[Enum]
-ModelNameMap = dict[TypeModelOrEnum, str]
+CacheKey = Union[Callable[..., Any], None]
+IncEx = Union[Set[int], Set[str], Dict[int, Any], Dict[str, Any]]
+TypeModelOrEnum = Union[type[BaseModel], type[Enum]]
+ModelNameMap = Dict[TypeModelOrEnum, str]
 UnionType = getattr(types, "UnionType", Union)