%pip install"pgvecto_rs[sdk]" langchain-community

from langchain_community.document_loadersimport TextLoader
from langchain_community.embeddings.fakeimport FakeEmbeddings
from langchain_community.vectorstoresimport Relyt
from langchain_text_splittersimport CharacterTextSplitter

loader= TextLoader("../../how_to/state_of_the_union.txt")
documents= loader.load()
text_splitter= CharacterTextSplitter(chunk_size=1000, chunk_overlap=0)
docs= text_splitter.split_documents(documents)

embeddings= FakeEmbeddings(size=1536)

export PG_HOST={your_relyt_hostname}
export PG_PORT={your_relyt_port} # Optional, default is 5432
export PG_DATABASE={your_database} # Optional, default is postgres
export PG_USER={database_username}
export PG_PASSWORD={database_password}

import os

connection_string= Relyt.connection_string_from_db_params(
    driver=os.environ.get("PG_DRIVER","psycopg2cffi"),
    host=os.environ.get("PG_HOST","localhost"),
    port=int(os.environ.get("PG_PORT","5432")),
    database=os.environ.get("PG_DATABASE","postgres"),
    user=os.environ.get("PG_USER","postgres"),
    password=os.environ.get("PG_PASSWORD","postgres"),
)

vector_db= Relyt.from_documents(
    docs,
    embeddings,
    connection_string=connection_string,
)

query="What did the president say about Ketanji Brown Jackson"
docs= vector_db.similarity_search(query)

print(docs[0].page_content)

Tonight. I call on the Senate to: Pass the Freedom to Vote Act. Pass the John Lewis Voting Rights Act. And while you’re at it, pass the Disclose Act so Americans can know who is funding our elections.

Tonight, I’d like to honor someone who has dedicated his life to serve this country: Justice Stephen Breyer—an Army veteran, Constitutional scholar, and retiring Justice of the United States Supreme Court. Justice Breyer, thank you for your service.

One of the most serious constitutional responsibilities a President has is nominating someone to serve on the United States Supreme Court.

And I did that 4 days ago, when I nominated Circuit Court of Appeals Judge Ketanji Brown Jackson. One of our nation’s top legal minds, who will continue Justice Breyer’s legacy of excellence.