⚡ Simplify and improve jsonable_encoder (#1754)

Co-authored-by: nimashadix <nimashadix@pop-os.localdomain>

fastapi/encoders.py

@@ -16,12 +16,9 @@ DictIntStrAny = Dict[Union[int, str], Any]
 def generate_encoders_by_class_tuples(
     type_encoder_map: Dict[Any, Callable]
 ) -> Dict[Callable, Tuple]:
-    encoders_by_classes: Dict[Callable, List] = defaultdict(list)
+    encoders_by_class_tuples: Dict[Callable, Tuple] = defaultdict(tuple)
     for type_, encoder in type_encoder_map.items():
-        encoders_by_classes[encoder].append(type_)
-    encoders_by_class_tuples: Dict[Callable, Tuple] = {}
-    for encoder, classes in encoders_by_classes.items():
-        encoders_by_class_tuples[encoder] = tuple(classes)
+        encoders_by_class_tuples[encoder] += (type_,)
     return encoders_by_class_tuples