docs/use_cases/code/code-analysis-deeplake.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Use LangChain, GPT and Deep Lake to work with code base\n",
    "In this tutorial, we are going to use Langchain + Deep Lake with GPT to analyze the code base of the LangChain itself. "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Design"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "1. Prepare data:\n",
    "   1. Upload all python project files using the `langchain.document_loaders.TextLoader`. We will call these files the **documents**.\n",
    "   2. Split all documents to chunks using the `langchain.text_splitter.CharacterTextSplitter`.\n",
    "   3. Embed chunks and upload them into the DeepLake using `langchain.embeddings.openai.OpenAIEmbeddings` and `langchain.vectorstores.DeepLake`\n",
    "2. Question-Answering:\n",
    "   1. Build a chain from `langchain.chat_models.ChatOpenAI` and `langchain.chains.ConversationalRetrievalChain`\n",
    "   2. Prepare questions.\n",
    "   3. Get answers running the chain.\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Implementation"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "tags": []
   },
   "source": [
    "### Integration preparations"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "We need to set up keys for external services and install necessary python libraries."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "tags": []
   },
   "outputs": [],
   "source": [
    "#!python3 -m pip install --upgrade langchain deeplake openai"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Set up OpenAI embeddings, Deep Lake multi-modal vector store api and authenticate. \n",
    "\n",
    "For full documentation of Deep Lake please follow https://docs.activeloop.ai/ and API reference https://docs.deeplake.ai/en/latest/"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
    "tags": []
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      " ········\n"
     ]
    }
   ],
   "source": [
    "import os\n",
    "from getpass import getpass\n",
    "\n",
    "os.environ['OPENAI_API_KEY'] = getpass()\n",
    "# Please manually enter OpenAI Key"
   ]
  },
  {
   "attachments": {},
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Authenticate into Deep Lake if you want to create your own dataset and publish it. You can get an API key from the platform at [app.activeloop.ai](https://app.activeloop.ai)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "tags": []
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      " ········\n"
     ]
    }
   ],
   "source": [
    "os.environ['ACTIVELOOP_TOKEN'] = getpass.getpass('Activeloop Token:')"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Prepare data "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Load all repository files. Here we assume this notebook is downloaded as the part of the langchain fork and we work with the python files of the `langchain` repo.\n",
    "\n",
    "If you want to use files from different repo, change `root_dir` to the root dir of your repo."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {
    "tags": []
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1147\n"
     ]
    }
   ],
   "source": [
    "from langchain.document_loaders import TextLoader\n",
    "\n",
    "root_dir = '../../../..'\n",
    "\n",
    "docs = []\n",
    "for dirpath, dirnames, filenames in os.walk(root_dir):\n",
    "    for file in filenames:\n",
    "        if file.endswith('.py') and '/.venv/' not in dirpath:\n",
    "            try: \n",
    "                loader = TextLoader(os.path.join(dirpath, file), encoding='utf-8')\n",
    "                docs.extend(loader.load_and_split())\n",
    "            except Exception as e: \n",
    "                pass\n",
    "print(f'{len(docs)}')"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Then, chunk the files"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {
    "tags": []
   },
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
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     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "3477\n"
     ]
    }
   ],
   "source": [
    "from langchain.text_splitter import CharacterTextSplitter\n",
    "\n",
    "text_splitter = CharacterTextSplitter(chunk_size=1000, chunk_overlap=0)\n",
    "texts = text_splitter.split_documents(docs)\n",
    "print(f\"{len(texts)}\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Then embed chunks and upload them to the DeepLake.\n",
    "\n",
    "This can take several minutes. "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {
    "tags": []
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "OpenAIEmbeddings(client=<class 'openai.api_resources.embedding.Embedding'>, model='text-embedding-ada-002', document_model_name='text-embedding-ada-002', query_model_name='text-embedding-ada-002', embedding_ctx_length=8191, openai_api_key=None, openai_organization=None, allowed_special=set(), disallowed_special='all', chunk_size=1000, max_retries=6)"
      ]
     },
     "execution_count": 14,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "from langchain.embeddings.openai import OpenAIEmbeddings\n",
    "\n",
    "embeddings = OpenAIEmbeddings()\n",
    "embeddings"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "tags": []
   },
   "outputs": [],
   "source": [
    "from langchain.vectorstores import DeepLake\n",
    "\n",
    "db = DeepLake.from_documents(texts, embeddings, dataset_path=f\"hub://{DEEPLAKE_ACCOUNT_NAME}/langchain-code\")\n",
    "db"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Question Answering\n",
    "First load the dataset, construct the retriever, then construct the Conversational Chain"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {
    "tags": []
   },
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "-"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "This dataset can be visualized in Jupyter Notebook by ds.visualize() or at https://app.activeloop.ai/user_name/langchain-code\n",
      "\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "/"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "hub://user_name/langchain-code loaded successfully.\n",
      "\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "Deep Lake Dataset in hub://user_name/langchain-code already exists, loading from the storage\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Dataset(path='hub://user_name/langchain-code', read_only=True, tensors=['embedding', 'ids', 'metadata', 'text'])\n",
      "\n",
      "  tensor     htype      shape       dtype  compression\n",
      "  -------   -------    -------     -------  ------- \n",
      " embedding  generic  (3477, 1536)  float32   None   \n",
      "    ids      text     (3477, 1)      str     None   \n",
      " metadata    json     (3477, 1)      str     None   \n",
      "   text      text     (3477, 1)      str     None   \n"
     ]
    }
   ],
   "source": [
    "db = DeepLake(dataset_path=f\"hub://{DEEPLAKE_ACCOUNT_NAME}/langchain-code\", read_only=True, embedding_function=embeddings)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {
    "tags": []
   },
   "outputs": [],
   "source": [
    "retriever = db.as_retriever()\n",
    "retriever.search_kwargs['distance_metric'] = 'cos'\n",
    "retriever.search_kwargs['fetch_k'] = 20\n",
    "retriever.search_kwargs['maximal_marginal_relevance'] = True\n",
    "retriever.search_kwargs['k'] = 20"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "You can also specify user defined functions using [Deep Lake filters](https://docs.deeplake.ai/en/latest/deeplake.core.dataset.html#deeplake.core.dataset.Dataset.filter)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "metadata": {
    "tags": []
   },
   "outputs": [],
   "source": [
    "def filter(x):\n",
    "    # filter based on source code\n",
    "    if 'something' in x['text'].data()['value']:\n",
    "        return False\n",
    "    \n",
    "    # filter based on path e.g. extension\n",
    "    metadata =  x['metadata'].data()['value']\n",
    "    return 'only_this' in metadata['source'] or 'also_that' in metadata['source']\n",
    "\n",
    "### turn on below for custom filtering\n",
    "# retriever.search_kwargs['filter'] = filter"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "metadata": {
    "tags": []
   },
   "outputs": [],
   "source": [
    "from langchain.chat_models import ChatOpenAI\n",
    "from langchain.chains import ConversationalRetrievalChain\n",
    "\n",
    "model = ChatOpenAI(model='gpt-3.5-turbo') # 'ada' 'gpt-3.5-turbo' 'gpt-4',\n",
    "qa = ConversationalRetrievalChain.from_llm(model,retriever=retriever)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "tags": []
   },
   "outputs": [],
   "source": [
    "questions = [\n",
    "    \"What is the class hierarchy?\",\n",
    "    # \"What classes are derived from the Chain class?\",\n",
    "    # \"What classes and functions in the ./langchain/utilities/ forlder are not covered by unit tests?\",\n",
    "    # \"What one improvement do you propose in code in relation to the class herarchy for the Chain class?\",\n",
    "] \n",
    "chat_history = []\n",
    "\n",
    "for question in questions:  \n",
    "    result = qa({\"question\": question, \"chat_history\": chat_history})\n",
    "    chat_history.append((question, result['answer']))\n",
    "    print(f\"-> **Question**: {question} \\n\")\n",
    "    print(f\"**Answer**: {result['answer']} \\n\")\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "tags": []
   },
   "source": [
    "-> **Question**: What is the class hierarchy? \n",
    "\n",
    "**Answer**: There are several class hierarchies in the provided code, so I'll list a few:\n",
    "\n",
    "1. `BaseModel` -> `ConstitutionalPrinciple`: `ConstitutionalPrinciple` is a subclass of `BaseModel`.\n",
    "2. `BasePromptTemplate` -> `StringPromptTemplate`, `AIMessagePromptTemplate`, `BaseChatPromptTemplate`, `ChatMessagePromptTemplate`, `ChatPromptTemplate`, `HumanMessagePromptTemplate`, `MessagesPlaceholder`, `SystemMessagePromptTemplate`, `FewShotPromptTemplate`, `FewShotPromptWithTemplates`, `Prompt`, `PromptTemplate`: All of these classes are subclasses of `BasePromptTemplate`.\n",
    "3. `APIChain`, `Chain`, `MapReduceDocumentsChain`, `MapRerankDocumentsChain`, `RefineDocumentsChain`, `StuffDocumentsChain`, `HypotheticalDocumentEmbedder`, `LLMChain`, `LLMBashChain`, `LLMCheckerChain`, `LLMMathChain`, `LLMRequestsChain`, `PALChain`, `QAWithSourcesChain`, `VectorDBQAWithSourcesChain`, `VectorDBQA`, `SQLDatabaseChain`: All of these classes are subclasses of `Chain`.\n",
    "4. `BaseLoader`: `BaseLoader` is a subclass of `ABC`.\n",
    "5. `BaseTracer` -> `ChainRun`, `LLMRun`, `SharedTracer`, `ToolRun`, `Tracer`, `TracerException`, `TracerSession`: All of these classes are subclasses of `BaseTracer`.\n",
    "6. `OpenAIEmbeddings`, `HuggingFaceEmbeddings`, `CohereEmbeddings`, `JinaEmbeddings`, `LlamaCppEmbeddings`, `HuggingFaceHubEmbeddings`, `TensorflowHubEmbeddings`, `SagemakerEndpointEmbeddings`, `HuggingFaceInstructEmbeddings`, `SelfHostedEmbeddings`, `SelfHostedHuggingFaceEmbeddings`, `SelfHostedHuggingFaceInstructEmbeddings`, `FakeEmbeddings`, `AlephAlphaAsymmetricSemanticEmbedding`, `AlephAlphaSymmetricSemanticEmbedding`: All of these classes are subclasses of `BaseLLM`. \n",
    "\n",
    "\n",
    "-> **Question**: What classes are derived from the Chain class? \n",
    "\n",
    "**Answer**: There are multiple classes that are derived from the Chain class. Some of them are:\n",
    "- APIChain\n",
    "- AnalyzeDocumentChain\n",
    "- ChatVectorDBChain\n",
    "- CombineDocumentsChain\n",
    "- ConstitutionalChain\n",
    "- ConversationChain\n",
    "- GraphQAChain\n",
    "- HypotheticalDocumentEmbedder\n",
    "- LLMChain\n",
    "- LLMCheckerChain\n",
    "- LLMRequestsChain\n",
    "- LLMSummarizationCheckerChain\n",
    "- MapReduceChain\n",
    "- OpenAPIEndpointChain\n",
    "- PALChain\n",
    "- QAWithSourcesChain\n",
    "- RetrievalQA\n",
    "- RetrievalQAWithSourcesChain\n",
    "- SequentialChain\n",
    "- SQLDatabaseChain\n",
    "- TransformChain\n",
    "- VectorDBQA\n",
    "- VectorDBQAWithSourcesChain\n",
    "\n",
    "There might be more classes that are derived from the Chain class as it is possible to create custom classes that extend the Chain class.\n",
    "\n",
    "\n",
    "-> **Question**: What classes and functions in the ./langchain/utilities/ forlder are not covered by unit tests? \n",
    "\n",
    "**Answer**: All classes and functions in the `./langchain/utilities/` folder seem to have unit tests written for them. \n"
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