Fixed get_value

api/src/core/get_value.py

@@ -1,5 +1,4 @@
-import ast
-from typing import Type, Optional, Any
+from typing import Type, Optional
 
 from core.typing import T
 
@@ -22,7 +21,9 @@ def get_value(
     :rtype: Optional[T]
     """
 
-    if key in source:
+    if key not in source:
+        return default
+
     value = source[key]
     if isinstance(
             value,
@@ -35,20 +36,18 @@ def get_value(
             return value.lower() in ["true", "1"]
 
         if (
-                cast_type
-                if not hasattr(cast_type, "__origin__")
-                else cast_type.__origin__
+                cast_type if not hasattr(cast_type, "__origin__") else cast_type.__origin__
         ) == list:
-                subtype = (
-                    cast_type.__args__[0] if hasattr(cast_type, "__args__") else None
-                )
+            if not (value.startswith("[") and value.endswith("]")) and list_delimiter not in value:
+                raise ValueError("List values must be enclosed in square brackets or use a delimiter.")
+
+            if value.startswith("[") and value.endswith("]"):
+                value = value[1:-1]
+
             value = value.split(list_delimiter)
-                return [
-                    subtype(item) if subtype is not None else item for item in value
-                ]
+            subtype = cast_type.__args__[0] if hasattr(cast_type, "__args__") else None
+            return [subtype(item) if subtype is not None else item for item in value]
 
         return cast_type(value)
     except (ValueError, TypeError):
         return default
-    else:
-        return default