语义检索使用入门

# Install the Client library (Semantic Retriever is only supported for versions >0.4.0)
pip install -U google.ai.generativelanguage

pip install -U google-auth-oauthlib

service_account_file_name = 'service_account_key.json'

from google.oauth2 import service_account

credentials = service_account.Credentials.from_service_account_file(service_account_file_name)

scoped_credentials = credentials.with_scopes(
    ['https://www.googleapis.com/auth/cloud-platform', 'https://www.googleapis.com/auth/generative-language.retriever'])

import google.ai.generativelanguage as glm
generative_service_client = glm.GenerativeServiceClient(credentials=scoped_credentials)
retriever_service_client = glm.RetrieverServiceClient(credentials=scoped_credentials)
permission_service_client = glm.PermissionServiceClient(credentials=scoped_credentials)

example_corpus = glm.Corpus(display_name="Google for Developers Blog")
create_corpus_request = glm.CreateCorpusRequest(corpus=example_corpus)

# Make the request
create_corpus_response = retriever_service_client.create_corpus(create_corpus_request)

# Set the `corpus_resource_name` for subsequent sections.
corpus_resource_name = create_corpus_response.name
print(create_corpus_response)

name: "corpora/google-for-developers-blog-dqrtz8rs0jg"
display_name: "Google for Developers Blog"
create_time {
  seconds: 1713497533
  nanos: 587977000
}
update_time {
  seconds: 1713497533
  nanos: 587977000
}

get_corpus_request = glm.GetCorpusRequest(name=corpus_resource_name)

# Make the request
get_corpus_response = retriever_service_client.get_corpus(get_corpus_request)

# Print the response
print(get_corpus_response)

# Create a document with a custom display name.
example_document = glm.Document(display_name="Introducing Project IDX, An Experiment to Improve Full-stack, Multiplatform App Development")

# Add metadata.
# Metadata also supports numeric values not specified here
document_metadata = [
    glm.CustomMetadata(key="url", string_value="https://developers.googleblog.com/2023/08/introducing-project-idx-experiment-to-improve-full-stack-multiplatform-app-development.html")]
example_document.custom_metadata.extend(document_metadata)

# Make the request
# corpus_resource_name is a variable set in the "Create a corpus" section.
create_document_request = glm.CreateDocumentRequest(parent=corpus_resource_name, document=example_document)
create_document_response = retriever_service_client.create_document(create_document_request)

# Set the `document_resource_name` for subsequent sections.
document_resource_name = create_document_response.name
print(create_document_response)

get_document_request = glm.GetDocumentRequest(name=document_resource_name)

# Make the request
# document_resource_name is a variable set in the "Create a document" section.
get_document_response = retriever_service_client.get_document(get_document_request)

# Print the response
print(get_document_response)

!pip install google-labs-html-chunker

from google_labs_html_chunker.html_chunker import HtmlChunker

from urllib.request import urlopen

with(urlopen("https://developers.googleblog.com/2023/08/introducing-project-idx-experiment-to-improve-full-stack-multiplatform-app-development.html")) as f:
  html = f.read().decode("utf-8")

# Chunk the file using HtmlChunker
chunker = HtmlChunker(
    max_words_per_aggregate_passage=200,
    greedily_aggregate_sibling_nodes=True,
    html_tags_to_exclude={"noscript", "script", "style"},
)
passages = chunker.chunk(html)
print(passages)


# Create `Chunk` entities.
chunks = []
for passage in passages:
    chunk = glm.Chunk(data={'string_value': passage})
    # Optionally, you can add metadata to a chunk
    chunk.custom_metadata.append(glm.CustomMetadata(key="tags",
                                                    string_list_value=glm.StringList(
                                                        values=["Google For Developers", "Project IDX", "Blog", "Announcement"])))
    chunk.custom_metadata.append(glm.CustomMetadata(key="chunking_strategy",
                                                    string_value="greedily_aggregate_sibling_nodes"))
    chunk.custom_metadata.append(glm.CustomMetadata(key = "publish_date",
                                                    numeric_value = 20230808))
    chunks.append(chunk)
print(chunks)

# Option 1: Use HtmlChunker in the section above.
# `chunks` is the variable set from the section above.
create_chunk_requests = []
for chunk in chunks:
  create_chunk_requests.append(glm.CreateChunkRequest(parent=document_resource_name, chunk=chunk))

# Make the request
request = glm.BatchCreateChunksRequest(parent=document_resource_name, requests=create_chunk_requests)
response = retriever_service_client.batch_create_chunks(request)
print(response)

# Add up to 100 CreateChunk requests per batch request.
# document_resource_name is a variable set in the "Create a document" section.
chunks = []
chunk_1 = glm.Chunk(data={'string_value': "Chunks support user specified metadata."})
chunk_1.custom_metadata.append(glm.CustomMetadata(key="section",
                                                  string_value="Custom metadata filters"))
chunk_2 = glm.Chunk(data={'string_value': "The maximum number of metadata supported is 20"})
chunk_2.custom_metadata.append(glm.CustomMetadata(key = "num_keys",
                                                  numeric_value = 20))
chunks = [chunk_1, chunk_2]
create_chunk_requests = []
for chunk in chunks:
  create_chunk_requests.append(glm.CreateChunkRequest(parent=document_resource_name, chunk=chunk))

# Make the request
request = glm.BatchCreateChunksRequest(parent=document_resource_name, requests=create_chunk_requests)
response = retriever_service_client.batch_create_chunks(request)
print(response)

# Make the request
request = glm.ListChunksRequest(parent=document_resource_name)
list_chunks_response = retriever_service_client.list_chunks(request)
for index, chunks in enumerate(list_chunks_response.chunks):
  print(f'\nChunk # {index + 1}')
  print(f'Resource Name: {chunks.name}')
  # Only ACTIVE chunks can be queried.
  print(f'State: {glm.Chunk.State(chunks.state).name}')

# Create a document with a custom display name.
example_document = glm.Document(display_name="How it’s Made: Interacting with Gemini through multimodal prompting")

# Add document metadata.
# Metadata also supports numeric values not specified here
document_metadata = [
    glm.CustomMetadata(key="url", string_value="https://developers.googleblog.com/2023/12/how-its-made-gemini-multimodal-prompting.html")]
example_document.custom_metadata.extend(document_metadata)

# Make the CreateDocument request
# corpus_resource_name is a variable set in the "Create a corpus" section.
create_document_request = glm.CreateDocumentRequest(parent=corpus_resource_name, document=example_document)
create_document_response = retriever_service_client.create_document(create_document_request)

# Set the `document_resource_name` for subsequent sections.
document_resource_name = create_document_response.name
print(create_document_response)

# Chunks - add another webpage from Google for Developers
with(urlopen("https://developers.googleblog.com/2023/12/how-its-made-gemini-multimodal-prompting.html")) as f:
  html = f.read().decode("utf-8")

# Chunk the file using HtmlChunker
chunker = HtmlChunker(
    max_words_per_aggregate_passage=100,
    greedily_aggregate_sibling_nodes=False,
)
passages = chunker.chunk(html)

# Create `Chunk` entities.
chunks = []
for passage in passages:
    chunk = glm.Chunk(data={'string_value': passage})
    chunk.custom_metadata.append(glm.CustomMetadata(key="tags",
                                                    string_list_value=glm.StringList(
                                                        values=["Google For Developers", "Gemini API", "Blog", "Announcement"])))
    chunk.custom_metadata.append(glm.CustomMetadata(key="chunking_strategy",
                                                    string_value="no_aggregate_sibling_nodes"))
    chunk.custom_metadata.append(glm.CustomMetadata(key = "publish_date",
                                                    numeric_value = 20231206))
    chunks.append(chunk)

# Make the request
create_chunk_requests = []
for chunk in chunks:
  create_chunk_requests.append(glm.CreateChunkRequest(parent=document_resource_name, chunk=chunk))
request = glm.BatchCreateChunksRequest(parent=document_resource_name, requests=create_chunk_requests)
response = retriever_service_client.batch_create_chunks(request)
print(response)

(year >= 2020 OR year < 2010) AND (genre = drama OR genre = action)

metadata_filter = [
  {
    key = "document.custom_metadata.year"
    conditions = [
      {int_value = 2020, operation = GREATER_EQUAL},
      {int_value = 2010, operation = LESS}]
  },
  {
    key = "document.custom_metadata.genre"
    conditions = [
      {string_value = "drama", operation = EQUAL},
      {string_value = "action", operation = EQUAL} }]
  }]

("Google for Developers" in tags) and (20230314 > publish_date)

metadata_filter = [
 {
    key = "chunk.custom_metadata.tags"
    conditions = [
    {string_value = 'Google for Developers', operation = INCLUDES},
  },
  {
    key = "chunk.custom_metadata.publish_date"
    conditions = [
    {numeric_value = 20230314, operation = GREATER_EQUAL}]
  }]

user_query = "What is the purpose of Project IDX?"
results_count = 5

# Add metadata filters for both chunk and document.
chunk_metadata_filter = glm.MetadataFilter(key='chunk.custom_metadata.tags',
                                           conditions=[glm.Condition(
                                              string_value='Google For Developers',
                                              operation=glm.Condition.Operator.INCLUDES)])

# Make the request
# corpus_resource_name is a variable set in the "Create a corpus" section.
request = glm.QueryCorpusRequest(name=corpus_resource_name,
                                 query=user_query,
                                 results_count=results_count,
                                 metadata_filters=[chunk_metadata_filter])
query_corpus_response = retriever_service_client.query_corpus(request)
print(query_corpus_response)

user_query = "What is the purpose of Project IDX?"
answer_style = "ABSTRACTIVE" # Or VERBOSE, EXTRACTIVE
MODEL_NAME = "models/aqa"

# Make the request
# corpus_resource_name is a variable set in the "Create a corpus" section.
content = glm.Content(parts=[glm.Part(text=user_query)])
retriever_config = glm.SemanticRetrieverConfig(source=corpus_resource_name, query=content)
req = glm.GenerateAnswerRequest(model=MODEL_NAME,
                                contents=[content],
                                semantic_retriever=retriever_config,
                                answer_style=answer_style)
aqa_response = generative_service_client.generate_answer(req)
print(aqa_response)

# Get the metadata from the first attributed passages for the source
chunk_resource_name = aqa_response.answer.grounding_attributions[0].source_id.semantic_retriever_chunk.chunk
get_chunk_response = retriever_service_client.get_chunk(name=chunk_resource_name)
print(get_chunk_response)

user_query = "What is AQA from Google?"
user_query_content = glm.Content(parts=[glm.Part(text=user_query)])
answer_style = "VERBOSE" # or ABSTRACTIVE, EXTRACTIVE
MODEL_NAME = "models/aqa"

# Create the grounding inline passages
grounding_passages = glm.GroundingPassages()
passage_a = glm.Content(parts=[glm.Part(text="Attributed Question and Answering (AQA) refers to answering questions grounded to a given corpus and providing citation")])
grounding_passages.passages.append(glm.GroundingPassage(content=passage_a, id="001"))
passage_b = glm.Content(parts=[glm.Part(text="An LLM is not designed to generate content grounded in a set of passages. Although instructing an LLM to answer questions only based on a set of passages reduces hallucination, hallucination still often occurs when LLMs generate responses unsupported by facts provided by passages")])
grounding_passages.passages.append(glm.GroundingPassage(content=passage_b, id="002"))
passage_c = glm.Content(parts=[glm.Part(text="Hallucination is one of the biggest problems in Large Language Models (LLM) development. Large Language Models (LLMs) could produce responses that are fictitious and incorrect, which significantly impacts the usefulness and trustworthiness of applications built with language models.")])
grounding_passages.passages.append(glm.GroundingPassage(content=passage_c, id="003"))

# Create the request
req = glm.GenerateAnswerRequest(model=MODEL_NAME,
                                contents=[user_query_content],
                                inline_passages=grounding_passages,
                                answer_style=answer_style)
aqa_response = generative_service_client.generate_answer(req)
print(aqa_response)

# Replace your-email@gmail.com with the email added as a test user in the OAuth Quickstart
shared_user_email = "TODO-your-email@gmail.com" #  @param {type:"string"}
user_type = "USER"
role = "READER"

# Make the request
# corpus_resource_name is a variable set in the "Create a corpus" section.
request = glm.CreatePermissionRequest(
    parent=corpus_resource_name,
    permission=glm.Permission(grantee_type=user_type,
                              email_address=shared_user_email,
                              role=role))
create_permission_response = permission_service_client.create_permission(request)
print(create_permission_response)

# Set force to False if you don't want to delete non-empty corpora.
req = glm.DeleteCorpusRequest(name=corpus_resource_name, force=True)
delete_corpus_response = retriever_service_client.delete_corpus(req)
print("Successfully deleted corpus: " + corpus_resource_name)

# Replace TODO-your-project-name with the project used in the OAuth Quickstart
project_name = "TODO-your-project-name" #  @param {type:"string"}
# Replace TODO-your-email@gmail.com with the email added as a test user in the OAuth Quickstart
email = "TODO-your-email@gmail.com" #  @param {type:"string"}
# Rename the uploaded file to `client_secret.json` OR
# Change the variable `client_file_name` in the code below.
client_file_name = "client_secret.json"

# IMPORTANT: Follow the instructions from the output - you must copy the command
# to your terminal and copy the output after authentication back here.
!gcloud config set project $project_name
!gcloud config set account $email

# NOTE: The simplified project setup in this tutorial triggers a "Google hasn't verified this app." dialog.
# This is normal, click "Advanced" -> "Go to [app name] (unsafe)"
!gcloud auth application-default login --no-browser --client-id-file=$client_file_name --scopes="https://www.googleapis.com/auth/generative-language.retriever,https://www.googleapis.com/auth/cloud-platform"

import google.ai.generativelanguage as glm

generative_service_client = glm.GenerativeServiceClient()
retriever_service_client = glm.RetrieverServiceClient()
permission_service_client = glm.PermissionServiceClient()