fix: mypy errors

src/backend/langflow/interface/loading.py

@@ -124,7 +124,7 @@ def load_agent_executor_from_config(
 
 
 def load_agent_executor(
-    agent_class: agent_module.Agent, allowed_tools, llm_chain, **kwargs
+    agent_class: type[agent_module.Agent], allowed_tools, llm_chain, **kwargs
 ):
     """Load agent executor from agent class, tools and chain"""
     tool_names = [tool.name for tool in allowed_tools]

src/backend/langflow/node/nodes.py

@@ -4,8 +4,8 @@ from langflow.utils.constants import DEFAULT_PYTHON_FUNCTION
 
 
 class ZeroShotPromptNode(FrontendNode):
-    name = "ZeroShotPrompt"
+    name: str = "ZeroShotPrompt"
-    template = Template(
+    template: Template = Template(
         type_name="zero_shot",
         fields=[
             Field(
@@ -40,16 +40,16 @@ class ZeroShotPromptNode(FrontendNode):
             ),
         ],
     )
-    description = "Prompt template for Zero Shot Agent."
+    description: str = "Prompt template for Zero Shot Agent."
-    base_classes = ["BasePromptTemplate"]
+    base_classes: list[str] = ["BasePromptTemplate"]
 
     def to_dict(self):
         return super().to_dict()
 
 
 class PythonFunctionNode(FrontendNode):
-    name = "PythonFunction"
+    name: str = "PythonFunction"
-    template = Template(
+    template: Template = Template(
         type_name="python_function",
         fields=[
             Field(
@@ -64,16 +64,16 @@ class PythonFunctionNode(FrontendNode):
             ),
         ],
     )
-    description = "Python function to be executed."
+    description: str = "Python function to be executed."
-    base_classes = ["function"]
+    base_classes: list[str] = ["function"]
 
     def to_dict(self):
         return super().to_dict()
 
 
 class ToolNode(FrontendNode):
-    name = "Tool"
+    name: str = "Tool"
-    template = Template(
+    template: Template = Template(
         type_name="tool",
         fields=[
             Field(
@@ -108,8 +108,8 @@ class ToolNode(FrontendNode):
             ),
         ],
     )
-    description = "Tool to be used in the flow."
+    description: str = "Tool to be used in the flow."
-    base_classes = ["BaseTool"]
+    base_classes: list[str] = ["BaseTool"]
 
     def to_dict(self):
         return super().to_dict()

src/backend/langflow/node/template.py

@@ -12,7 +12,7 @@ class Field(BaseModel):
     value: Any = None
     # _name will be used to store the name of the field
     # in the template
-    name: str = None
+    name: str = ""
 
     def to_dict(self):
         result = self.dict()
@@ -34,7 +34,7 @@ class FrontendNode(BaseModel):
     template: Template
     description: str
     base_classes: list
-    name: str = None
+    name: str = ""
 
     def to_dict(self):
         return {

src/backend/langflow/utils/graph.py

@@ -63,7 +63,7 @@ class Node:
                 continue
             if value["type"] not in ["str", "bool"]:
                 # Get the edge that connects to this node
-                edge: Edge = next(
+                edge = next(
                     (
                         edge
                         for edge in self.edges
@@ -222,7 +222,7 @@ class Graph:
         root_node = payload.get_root_node(self)
         return root_node.build()
 
-    def get_node_neighbors(self, node: Node) -> Dict[str, int]:
+    def get_node_neighbors(self, node: Node) -> Dict[Node, int]:
         neighbors: Dict[Node, int] = {}
         for edge in self.edges:
             if edge.source == node:

src/backend/langflow/utils/payload.py

@@ -76,7 +76,9 @@ def build_json(root, graph) -> Dict:
             if value["required"] and not children:
                 raise ValueError(f"No child with type {node_type} found")
             values = [build_json(child, graph) for child in children]
-            value = list(values) if value["list"] else next(iter(values), None)
+            value = (
+                list(values) if value["list"] else next(iter(values), None)  # type: ignore
+            )
         final_dict[key] = value
 
     return final_dict