Semantic Search with OpenAI QA

!pip install openai==1.3.3 --quiet

import openai

EMBEDDING_MODEL = "text-embedding-ada-002"
GPT_MODEL = "gpt-3.5-turbo"

import getpass
import os

os.environ['OPENAI_API_KEY'] = getpass.getpass('OpenAI API Key: ')

client = openai.OpenAI()

response = client.chat.completions.create(
  model=GPT_MODEL,
  messages=[
        {"role": "system", "content": "You are a helpful assistant."},
        {"role": "user", "content": "Who won the gold medal for curling in Olymics 2022?"},
    ]
)

print(response.choices[0].message.content)

!pip install tabulate tiktoken wget --quiet

import json
import numpy as np
import os
import pandas as pd
import wget

embeddings_url = "https://cdn.openai.com/API/examples/data/winter_olympics_2022.csv"
embeddings_path = "winter_olympics_2022.csv"

if not os.path.exists(embeddings_path):
    wget.download(embeddings_url, embeddings_path)
    print("File downloaded successfully.")
else:
    print("File already exists in the local file system.")

def json_to_numpy_array(x: str | None) -> np.ndarray | None:
    """Convert JSON array string into numpy array."""
    return np.array(json.loads(x)) if x else None

df = pd.read_csv(embeddings_path, converters=dict(embedding=json_to_numpy_array))
df

df.info(show_counts=True)

shared_tier_check = %sql show variables like 'is_shared_tier'
if not shared_tier_check or shared_tier_check[0][1] == 'OFF':
    %sql DROP DATABASE IF EXISTS winter_wikipedia;
    %sql CREATE DATABASE winter_wikipedia;

%%sql
CREATE TABLE IF NOT EXISTS winter_olympics_2022 (
    id INT PRIMARY KEY,
    text TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci,
    embedding BLOB
);

import singlestoredb as s2

conn = s2.create_engine().connect()

df.to_sql('winter_olympics_2022', con=conn, index=True, index_label='id', if_exists='append', chunksize=1000)

import sqlalchemy as sa


def get_embedding(text: str, model: str = 'text-embedding-ada-002') -> str:
    """Return the embeddings."""
    return [x.embedding for x in client.embeddings.create(input=[text], model=model).data][0]


def strings_ranked_by_relatedness(
    query: str,
    df: pd.DataFrame,
    table_name: str,
    relatedness_fn=lambda x, y: 1 - spatial.distance.cosine(x, y),
    top_n: int=100,
) -> tuple:
    """Returns a list of strings and relatednesses, sorted from most related to least."""

    # Get the embedding of the query.
    query_embedding_response = get_embedding(query, EMBEDDING_MODEL)

    # Create the SQL statement.
    stmt = sa.text(f"""
        SELECT
            text,
            DOT_PRODUCT_F64(JSON_ARRAY_PACK_F64(:embedding), embedding) AS score
        FROM {table_name}
        ORDER BY score DESC
        LIMIT :limit
    """)

    # Execute the SQL statement.
    results = conn.execute(stmt, dict(embedding=json.dumps(query_embedding_response), limit=top_n))

    strings = []
    relatednesses = []

    for row in results:
        strings.append(row[0])
        relatednesses.append(row[1])

    # Return the results.
    return strings[:top_n], relatednesses[:top_n]

from tabulate import tabulate

strings, relatednesses = strings_ranked_by_relatedness(
    "curling gold medal",
    df,
    "winter_olympics_2022",
    top_n=5
)

for string, relatedness in zip(strings, relatednesses):
    print(f"{relatedness=:.3f}")
    print(tabulate([[string]], headers=['Result'], tablefmt='fancy_grid'))
    print('\n\n')

import tiktoken


def num_tokens(text: str, model: str=GPT_MODEL) -> int:
    """Return the number of tokens in a string."""
    encoding = tiktoken.encoding_for_model(model)
    return len(encoding.encode(text))


def query_message(
    query: str,
    df: pd.DataFrame,
    model: str,
    token_budget: int
) -> str:
    """Return a message for GPT, with relevant source texts pulled from SingleStoreDB."""
    strings, relatednesses = strings_ranked_by_relatedness(query, df, "winter_olympics_2022")
    introduction = 'Use the below articles on the 2022 Winter Olympics to answer the subsequent question. If the answer cannot be found in the articles, write "I could not find an answer."'
    question = f"\n\nQuestion: {query}"
    message = introduction
    for string in strings:
        next_article = f'\n\nWikipedia article section:\n"""\n{string}\n"""'
        if (
            num_tokens(message + next_article + question, model=model)
            > token_budget
        ):
            break
        else:
            message += next_article
    return message + question


def ask(
    query: str,
    df: pd.DataFrame=df,
    model: str=GPT_MODEL,
    token_budget: int=4096 - 500,
    print_message: bool=False,
) -> str:
    """Answers a query using GPT and a table of relevant texts and embeddings in SingleStoreDB."""
    message = query_message(query, df, model=model, token_budget=token_budget)
    if print_message:
        print(message)
    messages = [
        {"role": "system", "content": "You answer questions about the 2022 Winter Olympics."},
        {"role": "user", "content": message},
    ]
    response = client.chat.completions.create(
        model=model,
        messages=messages,
        temperature=0
    )
    response_message = response.choices[0].message.content
    return response_message

print(ask('Who won the gold medal for curling in Olymics 2022?'))

shared_tier_check = %sql show variables like 'is_shared_tier'
if not shared_tier_check or shared_tier_check[0][1] == 'OFF':
    %sql DROP DATABASE IF EXISTS winter_wikipedia;