i run the indexing.py file with the terminal and the pinecone write in the file

When I Run indexing.py file with the terminal This is Code indexing.py

from langchain.document_loaders import DirectoryLoader from langchain.text_splitter import RecursiveCharacterTextSplitter import os

directory = '/data/SwiftProgrammingLanguage.pdf'

def load_docs(directory): loader = DirectoryLoader(directory) documents = loader.load() return documents

documents = load_docs(directory) len(documents)

def split_docs(documents,chunk_size=500,chunk_overlap=20): text_splitter = RecursiveCharacterTextSplitter(chunk_size=chunk_size, chunk_overlap=chunk_overlap) docs = text_splitter.split_documents(documents) return docs

docs = split_docs(documents) print(len(docs))

**when I run python3 indexing.py Getting error

python3 indexing.py

/Users/sarit.bahuguna/ai_chatbot/data/SwiftProgrammingLanguage.pdf

[nltk_data] Error loading punkt: <urlopen error [Errno 60] Operation