Update function base classes to use Callable

instead of function

src/backend/langflow/interface/tools/base.py

@@ -36,7 +36,7 @@ TOOL_INPUTS = {
         field_type="BaseLanguageModel", required=True, is_list=False, show=True
     ),
     "func": TemplateField(
-        field_type="function",
+        field_type="Callable",
         required=True,
         is_list=False,
         show=True,
@@ -126,7 +126,7 @@ class ToolCreator(LangChainTypeCreator):
         elif tool_type in CUSTOM_TOOLS:
             # Get custom tool params
             params = self.type_to_loader_dict[name]["params"]  # type: ignore
-            base_classes = ["function"]
+            base_classes = ["Callable"]
             if node := customs.get_custom_nodes("tools").get(tool_type):
                 return node
         elif tool_type in FILE_TOOLS:

src/backend/langflow/template/frontend_node/agents.py

@@ -206,7 +206,7 @@ class InitializeAgentNode(FrontendNode):
         ],
     )
     description: str = """Construct a zero shot agent from an LLM and tools."""
-    base_classes: list[str] = ["AgentExecutor", "function"]
+    base_classes: list[str] = ["AgentExecutor", "Callable"]
 
     def to_dict(self):
         return super().to_dict()

src/backend/langflow/template/frontend_node/chains.py

@@ -140,7 +140,7 @@ class SeriesCharacterChainNode(FrontendNode):
         "Chain",
         "ConversationChain",
         "SeriesCharacterChain",
-        "function",
+        "Callable",
     ]
 
 
@@ -241,7 +241,7 @@ class CombineDocsChainNode(FrontendNode):
         ],
     )
     description: str = """Load question answering chain."""
-    base_classes: list[str] = ["BaseCombineDocumentsChain", "function"]
+    base_classes: list[str] = ["BaseCombineDocumentsChain", "Callable"]
 
     def to_dict(self):
         return super().to_dict()

src/backend/langflow/template/frontend_node/tools.py

@@ -35,7 +35,7 @@ class ToolNode(FrontendNode):
             ),
             TemplateField(
                 name="func",
-                field_type="function",
+                field_type="Callable",
                 required=True,
                 is_list=False,
                 show=True,
@@ -135,7 +135,7 @@ class PythonFunctionNode(FrontendNode):
         ],
     )
     description: str = "Python function to be executed."
-    base_classes: list[str] = ["function"]
+    base_classes: list[str] = ["Callable"]
 
     def to_dict(self):
         return super().to_dict()

src/backend/langflow/utils/util.py

@@ -60,7 +60,7 @@ def build_template_from_function(
             # the output to be a function
             base_classes = get_base_classes(_class)
             if add_function:
-                base_classes.append("function")
+                base_classes.append("Callable")
 
             return {
                 "template": format_dict(variables, name),
@@ -114,7 +114,7 @@ def build_template_from_class(
             # Adding function to base classes to allow
             # the output to be a function
             if add_function:
-                base_classes.append("function")
+                base_classes.append("Callable")
             return {
                 "template": format_dict(variables, name),
                 "description": docs.short_description or "",
@@ -178,7 +178,7 @@ def build_template_from_method(
 
             # Adding function to base classes to allow the output to be a function
             if add_function:
-                base_classes.append("function")
+                base_classes.append("Callable")
 
             return {
                 "template": format_dict(variables, class_name),