style: Fix type comparison issues in codebase (#3606)

style: fix E721

src/backend/base/langflow/custom/utils.py

@@ -44,7 +44,7 @@ def add_output_types(frontend_node: CustomComponentFrontendNode, return_types: l
                     "traceback": traceback.format_exc(),
                 },
             )
-        if return_type == str:
+        if return_type is str:
             return_type = "Text"
         elif hasattr(return_type, "__name__"):
             return_type = return_type.__name__
@@ -85,7 +85,7 @@ def add_base_classes(frontend_node: CustomComponentFrontendNode, return_types: l
             )
 
         base_classes = get_base_classes(return_type_instance)
-        if return_type_instance == str:
+        if return_type_instance is str:
             base_classes.append("Text")
 
         for base_class in base_classes:

src/backend/base/langflow/helpers/custom.py

@@ -2,7 +2,7 @@
 
 
 def format_type(type_: Any) -> str:
-    if type_ == str:
+    if type_ is str:
         type_ = "Text"
     elif hasattr(type_, "__name__"):
         type_ = type_.__name__

src/backend/base/langflow/services/settings/base.py

@@ -36,8 +36,8 @@ def is_list_of_any(field: FieldInfo) -> bool:
         else:
             union_args = []
 
-        return field.annotation.__origin__ == list or any(
-            arg.__origin__ == list for arg in union_args if hasattr(arg, "__origin__")
+        return field.annotation.__origin__ is list or any(
+            arg.__origin__ is list for arg in union_args if hasattr(arg, "__origin__")
         )
     except AttributeError:
         return False

src/backend/base/langflow/template/field/base.py

@@ -119,7 +119,7 @@ def serialize_file_path(self, value):
 
     @field_serializer("field_type")
     def serialize_field_type(self, value, _info):
-        if value == float and self.range_spec is None:
+        if value is float and self.range_spec is None:
             self.range_spec = RangeSpec()
         return value
 

src/backend/tests/unit/io/test_io_schema.py

@@ -116,7 +116,7 @@ def test_non_standard_field_types_handling(self):
         input_instance = FileInput(name="file_field")
         schema = create_input_schema([input_instance])
         field_info = schema.model_fields["file_field"]
-        assert field_info.annotation == str
+        assert field_info.annotation is str
 
     # Inputs with mixed required and optional fields are processed correctly
     def test_mixed_required_optional_fields_processing(self):
@@ -184,7 +184,7 @@ def test_is_list_handling(self):
         input_instance = StrInput(name="test_field", is_list=True)
         schema = create_input_schema([input_instance])
         field_info = schema.model_fields["test_field"]
-        assert field_info.annotation == list[str]
+        assert field_info.annotation == list[str]  # type: ignore
 
     # Converting FieldTypes to corresponding Python types
     def test_field_types_conversion(self):
@@ -194,7 +194,7 @@ def test_field_types_conversion(self):
         input_instance = IntInput(name="int_field")
         schema = create_input_schema([input_instance])
         field_info = schema.model_fields["int_field"]
-        assert field_info.annotation == int
+        assert field_info.annotation is int  # Use 'is' for type comparison
 
     # Setting default values for non-required fields
     def test_default_values_for_non_required_fields(self):