OpenAI Assistants API with File Search

from openai import OpenAI
from pathlib import Path
import time

client = OpenAI()

# Upload knowledge file
file = client.files.create(file=Path('knowledge.txt').open('rb'), purpose='assistants')

# Create vector store
vs = client.beta.vector_stores.create(name='My Knowledge')
client.beta.vector_stores.files.create(vector_store_id=vs.id, file_id=file.id)

# Create assistant
assistant = client.beta.assistants.create(
    model='gpt-4o-mini',
    name='Knowledge Assistant',
    instructions='Answer questions using the provided files.',
    tools=[{'type': 'file_search'}],
    tool_resources={'file_search': {'vector_store_ids': [vs.id]}},
)

# Run a conversation
thread = client.beta.threads.create(messages=[{'role':'user','content':'What topics are covered?'}])
run = client.beta.threads.runs.create_and_poll(thread_id=thread.id, assistant_id=assistant.id)
messages = client.beta.threads.messages.list(thread_id=thread.id)
print(messages.data[0].content[0].text.value)