Refactor graph run method and custom component usage

src/backend/langflow/graph/graph/base.py

@@ -261,7 +261,45 @@ class Graph:
 
         return vertex_outputs
 
-    async def run(
+    def run(
+        self,
+        inputs: Dict[str, str],
+        input_components: Optional[list[str]] = None,
+        types: Optional[list[str]] = None,
+        outputs: Optional[list[str]] = None,
+        session_id: Optional[str] = None,
+        stream: bool = False,
+    ) -> List[RunOutputs]:
+        """
+        Run the graph with the given inputs and return the outputs.
+
+        Args:
+            inputs (Dict[str, str]): A dictionary of input values.
+            input_components (Optional[list[str]]): A list of input components.
+            types (Optional[list[str]]): A list of types.
+            outputs (Optional[list[str]]): A list of output components.
+            session_id (Optional[str]): The session ID.
+            stream (bool): Whether to stream the outputs.
+
+        Returns:
+            List[RunOutputs]: A list of RunOutputs objects representing the outputs.
+        """
+        # run the async function in a sync way
+        # this could be used in a FastAPI endpoint
+        # so we should take care of the event loop
+        loop = asyncio.get_event_loop()
+        return loop.run_until_complete(
+            self.arun(
+                inputs=inputs,
+                inputs_components=input_components,
+                types=types,
+                outputs=outputs,
+                session_id=session_id,
+                stream=stream,
+            )
+        )
+
+    async def arun(
         self,
         inputs: list[Dict[str, str]],
         inputs_components: Optional[list[list[str]]] = None,

src/backend/langflow/interface/custom/custom_component/custom_component.py

@@ -1,15 +1,6 @@
 import operator
 from pathlib import Path
-from typing import (
+from typing import TYPE_CHECKING, Any, Callable, ClassVar, List, Optional, Sequence, Union
-    TYPE_CHECKING,
-    Any,
-    Callable,
-    ClassVar,
-    List,
-    Optional,
-    Sequence,
-    Union,
-)
 from uuid import UUID
 
 import yaml
@@ -27,11 +18,7 @@ from langflow.schema import Record
 from langflow.schema.dotdict import dotdict
 from langflow.services.database.models.flow import Flow
 from langflow.services.database.utils import session_getter
-from langflow.services.deps import (
+from langflow.services.deps import get_credential_service, get_db_service, get_storage_service
-    get_credential_service,
-    get_db_service,
-    get_storage_service,
-)
 from langflow.services.storage.service import StorageService
 from langflow.utils import validate
 
@@ -370,7 +357,7 @@ class CustomComponent(Component):
             input_value = [input_value]
         graph = await self.load_flow(flow_id, tweaks)
         input_value_dict = [{"input_value": input_val} for input_val in input_value]
-        return await graph.run(input_value_dict, stream=False)
+        return await graph.arun(input_value_dict, stream=False)
 
     def list_flows(self, *, get_session: Optional[Callable] = None) -> List[Record]:
         if not self._user_id:

src/backend/langflow/processing/process.py

@@ -226,7 +226,7 @@ async def run_graph(
         inputs_list.append({INPUT_FIELD_NAME: input_value_request.input_value})
         types.append(input_value_request.type)
 
-    run_outputs = await graph.run(
+    run_outputs = await graph.arun(
         inputs_list,
         components,
         types,