Added fix for serializing PIL images (#1619)

reflex/utils/format.py

@@ -381,7 +381,7 @@ def format_image_data(value: Type) -> str:
     return f"data:image/png;base64,{base64_image}"
 
 
-def format_state(value: Any) -> Dict:
+def format_state(value: Any) -> Any:
     """Recursively format values in the given state.
 
     Args:
@@ -397,6 +397,10 @@ def format_state(value: Any) -> Dict:
     if isinstance(value, dict):
         return {k: format_state(v) for k, v in value.items()}
 
+    # Handle lists, sets, typles.
+    if isinstance(value, types.StateIterBases):
+        return [format_state(v) for v in value]
+
     # Return state vars as is.
     if isinstance(value, types.StateBases):
         return value

reflex/utils/types.py

@@ -14,6 +14,7 @@ GenericType = Union[Type, _GenericAlias]
 # Valid state var types.
 PrimitiveType = Union[int, float, bool, str, list, dict, set, tuple]
 StateVar = Union[PrimitiveType, Base, None]
+StateIterVar = Union[list, set, tuple]
 
 
 def get_args(alias: _GenericAlias) -> Tuple[Type, ...]:
@@ -198,3 +199,4 @@ def is_backend_variable(name: str) -> bool:
 
 # Store this here for performance.
 StateBases = get_base_class(StateVar)
+StateIterBases = get_base_class(StateIterVar)