refactor(importing/utils.py): move tool_creator import to import_tool function

refactor(tools/base.py): remove redundant variable assignment
refactor(tools/constants.py): import all tools dynamically using __all__ attribute of langchain.tools module

src/backend/langflow/interface/importing/utils.py

@@ -10,8 +10,6 @@ from langchain.chat_models.base import BaseChatModel
 from langchain.llms.base import BaseLLM
 from langchain.tools import BaseTool
 
-from langflow.interface.tools.base import tool_creator
-
 
 def import_module(module_path: str) -> Any:
     """Import module from module path"""
@@ -107,8 +105,13 @@ def import_llm(llm: str) -> BaseLLM:
 
 def import_tool(tool: str) -> BaseTool:
     """Import tool from tool name"""
+    from langflow.interface.tools.base import tool_creator
+    from langflow.interface.tools.constants import ALL_TOOLS_NAMES
 
-    return tool_creator.type_to_loader_dict[tool]["fcn"]
+    if tool in ALL_TOOLS_NAMES:
+        return tool_creator.type_to_loader_dict[tool]["fcn"]
+
+    return import_class(f"langchain.tools.{tool}")
 
 
 def import_chain(chain: str) -> Type[Chain]:

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

@@ -65,6 +65,7 @@ class ToolCreator(LangChainTypeCreator):
     def type_to_loader_dict(self) -> Dict:
         if self.tools_dict is None:
             all_tools = {}
+
             for tool, tool_fcn in ALL_TOOLS_NAMES.items():
                 tool_params = get_tool_params(tool_fcn)
                 tool_name = tool_params.get("name", tool)

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

@@ -1,3 +1,4 @@
+from langchain import tools
 from langchain.agents import Tool
 from langchain.agents.load_tools import (
     _BASE_TOOLS,
@@ -5,50 +6,16 @@ from langchain.agents.load_tools import (
     _EXTRA_OPTIONAL_TOOLS,
     _LLM_TOOLS,
 )
-from langchain.tools.bing_search.tool import BingSearchRun
-from langchain.tools.google_search.tool import GoogleSearchResults, GoogleSearchRun
-from langchain.tools.json.tool import JsonGetValueTool, JsonListKeysTool, JsonSpec
-from langchain.tools.python.tool import PythonAstREPLTool, PythonREPLTool
-from langchain.tools.requests.tool import (
-    RequestsDeleteTool,
-    RequestsGetTool,
-    RequestsPatchTool,
-    RequestsPostTool,
-    RequestsPutTool,
-)
-from langchain.tools.sql_database.tool import (
-    InfoSQLDatabaseTool,
-    ListSQLDatabaseTool,
-    QueryCheckerTool,
-    QuerySQLDataBaseTool,
-)
-from langchain.tools.wikipedia.tool import WikipediaQueryRun
-from langchain.tools.wolfram_alpha.tool import WolframAlphaQueryRun
+from langchain.tools.json.tool import JsonSpec
 
+from langflow.interface.importing.utils import import_class
 from langflow.interface.tools.custom import PythonFunction
 
 FILE_TOOLS = {"JsonSpec": JsonSpec}
 CUSTOM_TOOLS = {"Tool": Tool, "PythonFunction": PythonFunction}
-OTHER_TOOLS = {
-    "QuerySQLDataBaseTool": QuerySQLDataBaseTool,
-    "InfoSQLDatabaseTool": InfoSQLDatabaseTool,
-    "ListSQLDatabaseTool": ListSQLDatabaseTool,
-    "QueryCheckerTool": QueryCheckerTool,
-    "BingSearchRun": BingSearchRun,
-    "GoogleSearchRun": GoogleSearchRun,
-    "GoogleSearchResults": GoogleSearchResults,
-    "JsonListKeysTool": JsonListKeysTool,
-    "JsonGetValueTool": JsonGetValueTool,
-    "PythonREPLTool": PythonREPLTool,
-    "PythonAstREPLTool": PythonAstREPLTool,
-    "RequestsGetTool": RequestsGetTool,
-    "RequestsPostTool": RequestsPostTool,
-    "RequestsPatchTool": RequestsPatchTool,
-    "RequestsPutTool": RequestsPutTool,
-    "RequestsDeleteTool": RequestsDeleteTool,
-    "WikipediaQueryRun": WikipediaQueryRun,
-    "WolframAlphaQueryRun": WolframAlphaQueryRun,
-}
+
+OTHER_TOOLS = {tool: import_class(f"langchain.tools.{tool}") for tool in tools.__all__}
+
 ALL_TOOLS_NAMES = {
     **_BASE_TOOLS,
     **_LLM_TOOLS,  # type: ignore