Fix Any return type issues in term_color.py and import_utils.py

openhands/utils/import_utils.py

@@ -4,7 +4,7 @@
 T = TypeVar('T')
 
 
-def import_from(qual_name: str):
+def import_from(qual_name: str) -> object:
     """Import the value from the qualified name given"""
     parts = qual_name.split('.')
     module_name = '.'.join(parts[:-1])
@@ -18,5 +18,6 @@ def get_impl(cls: Type[T], impl_name: str | None) -> Type[T]:
     if impl_name is None:
         return cls
     impl_class = import_from(impl_name)
-    assert cls == impl_class or issubclass(impl_class, cls)
+    assert isinstance(impl_class, type), f"Expected a class, got {type(impl_class)}"
+    assert cls == impl_class or issubclass(impl_class, cls), f"Expected a subclass of {cls}, got {impl_class}"
     return impl_class

openhands/utils/term_color.py

@@ -22,4 +22,6 @@ def colorize(text: str, color: TermColor = TermColor.WARNING) -> str:
     Returns:
         str: Colored text
     """
-    return colored(text, color.value)
+    result = colored(text, color.value)
+    assert isinstance(result, str)
+    return result