new

.venv/lib/python3.9/site-packages/fastapi/datastructures.py

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+from typing import Any, Callable, Iterable, Type, TypeVar
+
+from starlette.datastructures import State as State  # noqa: F401
+from starlette.datastructures import UploadFile as StarletteUploadFile
+
+
+class UploadFile(StarletteUploadFile):
+    @classmethod
+    def __get_validators__(cls: Type["UploadFile"]) -> Iterable[Callable[..., Any]]:
+        yield cls.validate
+
+    @classmethod
+    def validate(cls: Type["UploadFile"], v: Any) -> Any:
+        if not isinstance(v, StarletteUploadFile):
+            raise ValueError(f"Expected UploadFile, received: {type(v)}")
+        return v
+
+
+class DefaultPlaceholder:
+    """
+    You shouldn't use this class directly.
+
+    It's used internally to recognize when a default value has been overwritten, even
+    if the overriden default value was truthy.
+    """
+
+    def __init__(self, value: Any):
+        self.value = value
+
+    def __bool__(self) -> bool:
+        return bool(self.value)
+
+    def __eq__(self, o: object) -> bool:
+        return isinstance(o, DefaultPlaceholder) and o.value == self.value
+
+
+DefaultType = TypeVar("DefaultType")
+
+
+def Default(value: DefaultType) -> DefaultType:
+    """
+    You shouldn't use this function directly.
+
+    It's used internally to recognize when a default value has been overwritten, even
+    if the overriden default value was truthy.
+    """
+    return DefaultPlaceholder(value)  # type: ignore