Update Base interface of Index/Retrieval pipeline (#36)

* add base Tool

* minor update test_tool

* update test dependency

* update test dependency

* Fix namespace conflict

* update test

* add base Agent Interface, add ReWoo Agent

* minor update

* update test

* fix typo

* remove unneeded print

* update rewoo agent

* add LLMTool

* update BaseAgent type

* add ReAct agent

* add ReAct agent

* minor update

* minor update

* minor update

* minor update

* update base reader with BaseComponent

* add splitter

* update agent and tool

* update vectorstores

* update load/save for indexing and retrieving pipeline

* update test_agent for more use-cases

* add missing dependency for test

* update test case for in memory vectorstore

* add TextSplitter to BaseComponent

* update type hint basetool

---------

Co-authored-by: trducng <trungduc1992@gmail.com>

tests/test_agent.py

@@ -1,11 +1,19 @@
 from unittest.mock import patch
 
+import pytest
+
 from kotaemon.llms.chats.openai import AzureChatOpenAI
 from kotaemon.pipelines.agents.react import ReactAgent
 from kotaemon.pipelines.agents.rewoo import RewooAgent
-from kotaemon.pipelines.tools import GoogleSearchTool, LLMTool, WikipediaTool
+from kotaemon.pipelines.tools import (
+    BaseTool,
+    GoogleSearchTool,
+    LLMTool,
+    WikipediaTool,
+)
 
 FINAL_RESPONSE_TEXT = "Hello Cinnamon AI!"
+
 _openai_chat_completion_responses_rewoo = [
     {
         "id": "chatcmpl-7qyuw6Q1CFCpcKsMdFkmUPUa7JP2x",
@@ -73,19 +81,61 @@ _openai_chat_completion_responses_react = [
     ]
 ]
 
+_openai_chat_completion_responses_react_langchain_tool = [
+    {
+        "id": "chatcmpl-7qyuw6Q1CFCpcKsMdFkmUPUa7JP2x",
+        "object": "chat.completion",
+        "created": 1692338378,
+        "model": "gpt-35-turbo",
+        "choices": [
+            {
+                "index": 0,
+                "finish_reason": "stop",
+                "message": {
+                    "role": "assistant",
+                    "content": text,
+                },
+            }
+        ],
+        "usage": {"completion_tokens": 9, "prompt_tokens": 10, "total_tokens": 19},
+    }
+    for text in [
+        (
+            "I don't have prior knowledge about Cinnamon AI company, "
+            "so I should gather information about it.\n"
+            "Action: Wikipedia\n"
+            "Action Input: Cinnamon AI company\n"
+        ),
+        (
+            "The information retrieved from Wikipedia is not "
+            "about Cinnamon AI company, but about Blue Prism, "
+            "a British multinational software corporation. "
+            "I need to try another source to gather information "
+            "about Cinnamon AI company.\n"
+            "Action: duckduckgo_search\n"
+            "Action Input: Cinnamon AI company\n"
+        ),
+        FINAL_RESPONSE_TEXT,
+    ]
+]
 
-@patch(
-    "openai.api_resources.chat_completion.ChatCompletion.create",
-    side_effect=_openai_chat_completion_responses_rewoo,
-)
-def test_rewoo_agent(openai_completion):
-    llm = AzureChatOpenAI(
+
+@pytest.fixture
+def llm():
+    return AzureChatOpenAI(
         openai_api_base="https://dummy.openai.azure.com/",
         openai_api_key="dummy",
         openai_api_version="2023-03-15-preview",
         deployment_name="dummy-q2",
         temperature=0,
     )
+
+
+@patch(
+    "openai.api_resources.chat_completion.ChatCompletion.create",
+    side_effect=_openai_chat_completion_responses_rewoo,
+)
+def test_rewoo_agent(openai_completion, llm):
     plugins = [
         GoogleSearchTool(),
         WikipediaTool(),
@@ -103,14 +153,7 @@ def test_rewoo_agent(openai_completion):
     "openai.api_resources.chat_completion.ChatCompletion.create",
     side_effect=_openai_chat_completion_responses_react,
 )
-def test_react_agent(openai_completion):
-    llm = AzureChatOpenAI(
-        openai_api_base="https://dummy.openai.azure.com/",
-        openai_api_key="dummy",
-        openai_api_version="2023-03-15-preview",
-        deployment_name="dummy-q2",
-        temperature=0,
-    )
+def test_react_agent(openai_completion, llm):
     plugins = [
         GoogleSearchTool(),
         WikipediaTool(),
@@ -121,3 +164,47 @@ def test_react_agent(openai_completion):
     response = agent("Tell me about Cinnamon AI company")
     openai_completion.assert_called()
     assert response.output == FINAL_RESPONSE_TEXT
+
+
+@patch(
+    "openai.api_resources.chat_completion.ChatCompletion.create",
+    side_effect=_openai_chat_completion_responses_react,
+)
+def test_react_agent_langchain(openai_completion, llm):
+    from langchain.agents import AgentType, initialize_agent
+
+    plugins = [
+        GoogleSearchTool(),
+        WikipediaTool(),
+        LLMTool(llm=llm),
+    ]
+    langchain_plugins = [tool.to_langchain_format() for tool in plugins]
+    agent = initialize_agent(
+        langchain_plugins,
+        llm.agent,
+        agent=AgentType.OPENAI_FUNCTIONS,
+        verbose=True,
+    )
+    response = agent("Tell me about Cinnamon AI company")
+    openai_completion.assert_called()
+    assert response
+
+
+@patch(
+    "openai.api_resources.chat_completion.ChatCompletion.create",
+    side_effect=_openai_chat_completion_responses_react_langchain_tool,
+)
+def test_react_agent_with_langchain_tools(openai_completion, llm):
+    from langchain.tools import DuckDuckGoSearchRun, WikipediaQueryRun
+    from langchain.utilities import WikipediaAPIWrapper
+
+    wikipedia = WikipediaQueryRun(api_wrapper=WikipediaAPIWrapper())
+    search = DuckDuckGoSearchRun()
+
+    langchain_plugins = [wikipedia, search]
+    plugins = [BaseTool.from_langchain_format(tool) for tool in langchain_plugins]
+    agent = ReactAgent(llm=llm, plugins=plugins, max_iterations=4)
+
+    response = agent("Tell me about Cinnamon AI company")
+    openai_completion.assert_called()
+    assert response.output == FINAL_RESPONSE_TEXT