How to Generate an Open API Key and PDF Summarization with LangChain

This article will explain how to generate an OpenAI API key and how to use PDF summarization. OpenAI API keys are used to access third-party APIs, such as text summarization. PDF summarization is the process of extracting critical information from a PDF file and presenting it concisely. This can be useful for quickly scanning long documents or for getting the gist of a document without reading the entire thing.

To Generate OpenAI API Key

• you will need to create an account, visit https://platform.openai.com/account/api-keys
• Click Create New API key
• To explore and experiment with the API, all new users get free $5 worth of free tokens. These tokens expire after 3 months. After this, you can choose to enter billing information to upgrade to a paid plan and continue your use of the API on a pay-as-you-go basis.
• You can check your usage and validity here

PDF Summarization using Langchain

• Paste your OpenAI API key

import os
os.environ["OPENAI_API_KEY"] = "PASTE_OPENAI_API_KEY_HERE"

pip install langchain

• Import necessary libraries

from langchain import OpenAI
from langchain.chains.summarize import load_summarize_chain
from langchain.document_loaders import PyPDFLoader

llm      = OpenAI(temperature=0)
loader   = PyPDFLoader('path_to_pdf')

• Define a function to summarize pdf using Langchain

def summarize_pdf(pdf_file_path):
    loader  = PyPDFLoader(pdf_file_path)
    docs    = loader.load_and_split()
    chain   = load_summarize_chain(llm=llm, chain_type="map_reduce")
    summary = chain.run(docs)   
    return summary

• Call the function

summarize = summarize_pdf("path_to_pdf")
print(summarize)

This is how the pdf content is summarized using Langchain.

PDF summarization can be a useful tool for quickly scanning long documents or for getting the gist of a document without reading the entire thing. By following the steps in this article, you will be able to generate an Open API key and use PDF summarization to extract the key information from PDF files.

Happy Learning!!!!