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Penelusuran dokumen dengan embedding

Lihat di ai.google.dev

Menjalankan di Google Colab

Lihat sumber di GitHub

Ringkasan

Contoh ini menunjukkan cara menggunakan Gemini API untuk membuat embedding sehingga Anda dapat melakukan penelusuran dokumen. Anda akan menggunakan library klien Python untuk membuat embedding kata yang memungkinkan Anda membandingkan string penelusuran, atau pertanyaan, untuk mendokumentasikan konten.

Dalam tutorial ini, Anda akan menggunakan embeddings untuk melakukan penelusuran dokumen pada sekumpulan dokumen guna mengajukan pertanyaan terkait Google Car.

Prasyarat

Anda dapat menjalankan panduan memulai ini di Google Colab.

Untuk menyelesaikan panduan memulai ini di lingkungan pengembangan Anda sendiri, pastikan lingkungan Anda memenuhi persyaratan berikut:

Python 3.9 dan yang lebih baru
Penginstalan jupyter untuk menjalankan notebook.

Penyiapan

Pertama, download dan instal library Python Gemini API.

pip install -U -q google.generativeai

import textwrap
import numpy as np
import pandas as pd

import google.generativeai as genai
import google.ai.generativelanguage as glm

# Used to securely store your API key
from google.colab import userdata

from IPython.display import Markdown

Ambil Kunci API

Sebelum dapat menggunakan Gemini API, Anda harus mendapatkan kunci API terlebih dahulu. Jika Anda belum memilikinya, buat kunci dengan sekali klik di Google AI Studio.

Mendapatkan kunci API

Di Colab, tambahkan kunci ke secret manager di bawah "mo" di panel kiri. Beri nama API_KEY.

Setelah Anda memiliki kunci API, teruskan ke SDK. Anda dapat melakukannya dengan dua cara:

Masukkan kunci di variabel lingkungan GOOGLE_API_KEY (SDK akan otomatis mengambilnya dari sana).
Teruskan kunci ke genai.configure(api_key=...)

# Or use `os.getenv('API_KEY')` to fetch an environment variable.
API_KEY=userdata.get('API_KEY')

genai.configure(api_key=API_KEY)

for m in genai.list_models():
  if 'embedContent' in m.supported_generation_methods:
    print(m.name)

models/embedding-001
models/embedding-001

Pembuatan penyematan

Di bagian ini, Anda akan mempelajari cara membuat embedding untuk sebuah teks menggunakan embedding dari Gemini API.

Perubahan API pada Embeddings dengan model embedding-001

Untuk model embedding baru, embedding-001, ada parameter jenis tugas baru dan judul opsional (hanya valid dengan task_type=RETRIEVAL_DOCUMENT).

Parameter baru ini hanya berlaku untuk model embedding terbaru.Jenis tugasnya adalah:

Jenis Tugas	Deskripsi
RETRIEVAL_QUERY	Menentukan bahwa teks yang diberikan merupakan kueri dalam setelan penelusuran/pengambilan.
RETRIEVAL_DOCUMENT	Menentukan bahwa teks yang diberikan adalah dokumen dalam setelan penelusuran/pengambilan.
SEMANTIC_SIMILARITY	Menentukan bahwa teks yang diberikan akan digunakan untuk Kemiripan Teks Semantik (STS).
KLASIFIKASI	Menentukan bahwa embedding akan digunakan untuk klasifikasi.
PENGELOLAAN	Menentukan bahwa embedding akan digunakan untuk pengelompokan.

title = "The next generation of AI for developers and Google Workspace"
sample_text = ("Title: The next generation of AI for developers and Google Workspace"
    "\n"
    "Full article:\n"
    "\n"
    "Gemini API & Google AI Studio: An approachable way to explore and prototype with generative AI applications")

model = 'models/embedding-001'
embedding = genai.embed_content(model=model,
                                content=sample_text,
                                task_type="retrieval_document",
                                title=title)

print(embedding)

{'embedding': [0.034585103, -0.044509504, -0.027291223, 0.0072681927, 0.061689284, 0.03362112, 0.028627988, 0.022681564, 0.04958079, 0.07274552, 0.011150464, 0.04200501, -0.029782884, -0.0041767005, 0.05074771, -0.056339227, 0.051204756, 0.04734613, -0.022025354, 0.025162602, 0.046016376, -0.003416976, -0.024010269, -0.044340927, -0.01520864, -0.013577372, -0.009918958, -0.028144406, -0.00024770075, 0.031201784, -0.072506696, 0.022366496, -0.032672316, -0.0025522006, -0.0019957912, -0.023193765, -0.020633291, -0.014031609, -0.00071676675, -0.0073200124, 0.014770645, -0.09390713, -0.017846372, 0.032825496, 0.017616265, -0.046674345, 0.03469292, 0.03386835, 0.0028274113, -0.07737739, 0.023789782, 0.025950644, 0.06952142, -0.029875675, -0.018693604, 0.007266584, -0.0067282487, 0.000802912, 0.020609016, 0.012406181, -0.018825717, 0.051171597, -0.0080359895, 0.008457639, 0.01197146, -0.080320396, -0.040698495, 0.0018266322, 0.042915005, 0.021464704, 0.022519842, 0.0059912056, 0.050887667, -0.04566639, -0.012651369, -0.14023173, -0.0274054, 0.04492792, 0.014709818, 0.037258334, -0.021294944, -0.041852854, -0.069640376, -0.030281356, -0.0070775123, 0.019886682, -0.050179508, -0.03839318, -0.014652514, 0.03370254, -0.02803748, -0.059206057, 0.055928297, -0.034912255, -0.007784368, 0.098106734, -0.06873356, -0.052850258, -0.011798939, -0.030071719, -0.026038093, 0.016752971, -0.020916667, 0.007365556, 0.017650642, 0.006677715, -0.036498126, 0.02110524, -0.05625146, 0.043038886, -0.06515849, -0.019825866, -0.010379261, -0.037537806, 0.017674655, -0.042821705, 0.014320703, 0.036735073, 0.011445211, 0.027352763, -0.0028090556, 0.009011982, 0.024146665, 0.002215841, -0.07397819, 0.008714616, -0.03377923, 0.034349587, 0.022429721, 0.052665956, -0.0021583177, -0.040462274, -0.019938014, 0.030099798, 0.009743918, 0.009111553, 0.026379738, -0.015910586, 0.010171418, 0.023996552, -0.031924065, 0.024775924, 0.014129728, 0.008913726, -0.010156162, 0.05407575, -0.080851324, 0.022005167, 0.012674272, -0.017213775, -0.009514327, 0.03276702, -0.06795425, -0.0004906647, 0.036379207, 0.034329377, -0.037122324, 0.05565231, -0.0038797501, 0.009620726, 0.050033607, 0.0084967585, 0.050638147, 0.00490447, 0.006675041, -0.04295331, -0.006490465, 0.010016808, -0.011493882, 0.023702862, 0.029825455, 0.03514081, -0.013388401, -0.05283049, 0.00019729362, -0.05095579, -0.031205554, 0.0045187837, -0.0066217924, -0.007931168, -0.0030577614, -0.016934164, 0.04188085, 0.050768845, 0.009407336, -0.02838461, 0.079967216, -0.038705315, -0.06723827, 0.015558192, -0.043977134, -0.022096274, -0.0053875325, -0.022216668, 0.013843675, 0.04506347, 0.051535256, 0.033484843, 0.044276737, -0.01299742, 0.021727907, 0.06798745, 0.038896713, 0.0023941514, 0.00815586, 0.029679826, 0.109524906, 0.012102062, -0.058510404, 0.03252702, -0.050666984, -0.006376317, 0.026164565, 0.008671174, 0.05052107, -0.027606683, 0.005126455, -0.0029112308, -0.015136989, -0.026336055, -0.031090762, 0.01717387, 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0.00057833333, -0.04805651, 0.01602842, -0.005916167, -0.0020399855, 0.036410075, -0.09505558, -0.021768136, 0.021421269, 0.024159726, -0.013026249, -0.023113504, 0.02459358, 0.01643742, -0.0104496805, 0.033115752, 0.047128692, 0.05519812, -0.013151745, 0.03202098, 0.0014973703, -0.009810199, 0.09950044, 0.03161514, 0.022533545, 0.028800217, 0.011425177, -0.06616128, 0.018490529, -0.024615118, -0.01714155, -0.036444064, -0.024078121, 6.236274e-05, -0.025733253, -0.012052791, -0.0032004463, -0.007022415, -0.07943268, -0.010401283, 0.014510383, -0.017218677, 0.056253612, -0.028017681, -0.06288073, -0.0010291388, 0.042233694, -0.017423663, -0.014384363, 0.008450004, -0.006025767, 0.00068278343, 0.043332722, -0.048530027, -0.10272868, 0.016439026, -0.0043581687, 0.014065921, 0.015250153, 0.0035983857, 0.024789328, 0.052941743, 0.0023809967, -0.0041563907, -0.02350335, -0.05152261, -0.026173577, 0.025396436, -0.020441707, 0.0052804356, 0.017074147, -0.023429962, 0.028667469, -0.056579348, -0.045674913, -0.050122924, -0.029717976, 0.011392094, 0.01918305, -0.090463236, 0.011211278, -0.058831867, -0.027594091, -0.08303421, -0.014075257, -0.013071177, 0.0050326143, 0.024727797, -0.004616583, -0.007565293, 0.0043535405, -0.05543633, -0.022187654, -0.026209656, 0.064442314, -0.0066669765, -0.002169784, -0.019930722, 4.8227314e-05, -0.0015547068, -0.0057820054, -0.08949447, -0.0115463175, -0.026195917, -0.008628893, -0.0017553791, -0.08588936, 0.008043627, -0.040522296, -0.006249298, -0.040554754, 0.021548215, 0.049422685, -0.008809529, -0.024933426, -0.040077355, 0.038274486, 0.029687686, -0.02959238, 0.0426982, 0.029072417, 0.049369767, -0.018109215, -0.041628513, -0.005594527, 0.026668772, -0.027726736, 0.037220005, 0.058132544, 0.01863369, -0.04707943, -0.0006536238, -0.012569923, 0.01520091, 0.05510794, -0.05035494, 0.036055118, -0.020710817, -0.0051193447, -0.042542584, 0.0020174137, 0.0014168078, -0.001090868, -0.034683146, 0.06309216, -0.05918888, 0.017469395, 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Membangun database embeddings

Berikut adalah tiga teks contoh yang dapat digunakan untuk membangun database embedding. Anda akan menggunakan Gemini API untuk membuat embedding dari setiap dokumen. Ubah menjadi {i>dataframe<i} untuk visualisasi yang lebih baik.

DOCUMENT1 = {
    "title": "Operating the Climate Control System",
    "content": "Your Googlecar has a climate control system that allows you to adjust the temperature and airflow in the car. To operate the climate control system, use the buttons and knobs located on the center console.  Temperature: The temperature knob controls the temperature inside the car. Turn the knob clockwise to increase the temperature or counterclockwise to decrease the temperature. Airflow: The airflow knob controls the amount of airflow inside the car. Turn the knob clockwise to increase the airflow or counterclockwise to decrease the airflow. Fan speed: The fan speed knob controls the speed of the fan. Turn the knob clockwise to increase the fan speed or counterclockwise to decrease the fan speed. Mode: The mode button allows you to select the desired mode. The available modes are: Auto: The car will automatically adjust the temperature and airflow to maintain a comfortable level. Cool: The car will blow cool air into the car. Heat: The car will blow warm air into the car. Defrost: The car will blow warm air onto the windshield to defrost it."}
DOCUMENT2 = {
    "title": "Touchscreen",
    "content": "Your Googlecar has a large touchscreen display that provides access to a variety of features, including navigation, entertainment, and climate control. To use the touchscreen display, simply touch the desired icon.  For example, you can touch the \"Navigation\" icon to get directions to your destination or touch the \"Music\" icon to play your favorite songs."}
DOCUMENT3 = {
    "title": "Shifting Gears",
    "content": "Your Googlecar has an automatic transmission. To shift gears, simply move the shift lever to the desired position.  Park: This position is used when you are parked. The wheels are locked and the car cannot move. Reverse: This position is used to back up. Neutral: This position is used when you are stopped at a light or in traffic. The car is not in gear and will not move unless you press the gas pedal. Drive: This position is used to drive forward. Low: This position is used for driving in snow or other slippery conditions."}

documents = [DOCUMENT1, DOCUMENT2, DOCUMENT3]

Mengatur isi kamus ke dalam {i>dataframe<i} untuk visualisasi yang lebih baik.

df = pd.DataFrame(documents)
df.columns = ['Title', 'Text']
df

Dapatkan embedding untuk setiap isi teks ini. Tambahkan informasi ini ke {i>dataframe<i}.

# Get the embeddings of each text and add to an embeddings column in the dataframe
def embed_fn(title, text):
  return genai.embed_content(model=model,
                             content=text,
                             task_type="retrieval_document",
                             title=title)["embedding"]

df['Embeddings'] = df.apply(lambda row: embed_fn(row['Title'], row['Text']), axis=1)
df

Penelusuran dokumen dengan Tanya Jawab

Setelah embedding dibuat, mari kita buat sistem Tanya Jawab untuk menelusuri dokumen ini. Anda akan mengajukan pertanyaan tentang penyesuaian hyperparameter, membuat embedding pertanyaan, dan membandingkannya dengan kumpulan embedding dalam dataframe.

Embedding pertanyaan akan menjadi vektor (daftar nilai float), yang akan dibandingkan dengan vektor dokumen menggunakan produk titik. Vektor yang ditampilkan dari API ini sudah dinormalkan. Perkalian titik merepresentasikan kesamaan arah antara dua vektor.

Nilai produk titik dapat berkisar antara -1 dan 1, inklusif. Jika perkalian titik antara dua vektor adalah 1, maka vektor berada di arah yang sama. Jika nilai produk titik adalah 0, maka vektor ini ortogonal, atau tidak terkait, satu sama lain. Terakhir, jika perkalian titik adalah -1, maka vektor akan menunjuk ke arah yang berlawanan dan tidak mirip satu sama lain.

Perlu diperhatikan, dengan model embedding baru (embedding-001), tentukan jenis tugas sebagai QUERY untuk kueri pengguna dan DOCUMENT saat menyematkan teks dokumen.

Jenis Tugas	Deskripsi
RETRIEVAL_QUERY	Menentukan bahwa teks yang diberikan merupakan kueri dalam setelan penelusuran/pengambilan.
RETRIEVAL_DOCUMENT	Menentukan bahwa teks yang diberikan adalah dokumen dalam setelan penelusuran/pengambilan.

query = "How do you shift gears in the Google car?"
model = 'models/embedding-001'

request = genai.embed_content(model=model,
                              content=query,
                              task_type="retrieval_query")

Gunakan fungsi find_best_passage untuk menghitung perkalian titik, lalu urutkan dataframe dari nilai produk titik terbesar ke terkecil untuk mengambil bagian yang relevan dari database.

def find_best_passage(query, dataframe):
  """
  Compute the distances between the query and each document in the dataframe
  using the dot product.
  """
  query_embedding = genai.embed_content(model=model,
                                        content=query,
                                        task_type="retrieval_query")
  dot_products = np.dot(np.stack(dataframe['Embeddings']), query_embedding["embedding"])
  idx = np.argmax(dot_products)
  return dataframe.iloc[idx]['Text'] # Return text from index with max value

Melihat dokumen yang paling relevan dari database:

passage = find_best_passage(query, df)
passage

'Shifting Gears  Your Googlecar has an automatic transmission. To shift gears, simply move the shift lever to the desired position.  Park: This position is used when you are parked. The wheels are locked and the car cannot move. Reverse: This position is used to back up. Neutral: This position is used when you are stopped at a light or in traffic. The car is not in gear and will not move unless you press the gas pedal. Drive: This position is used to drive forward. Low: This position is used for driving in snow or other slippery conditions.'

Aplikasi Tanya Jawab

Mari kita coba menggunakan API pembuatan teks untuk membuat sistem Tanya Jawab. Masukkan data khusus Anda sendiri di bawah ini untuk membuat contoh pertanyaan dan jawaban sederhana. Anda akan tetap menggunakan produk titik sebagai metrik kemiripan.

def make_prompt(query, relevant_passage):
  escaped = relevant_passage.replace("'", "").replace('"', "").replace("\n", " ")
  prompt = textwrap.dedent("""You are a helpful and informative bot that answers questions using text from the reference passage included below. \
  Be sure to respond in a complete sentence, being comprehensive, including all relevant background information. \
  However, you are talking to a non-technical audience, so be sure to break down complicated concepts and \
  strike a friendly and converstional tone. \
  If the passage is irrelevant to the answer, you may ignore it.
  QUESTION: '{query}'
  PASSAGE: '{relevant_passage}'

    ANSWER:
  """).format(query=query, relevant_passage=escaped)

  return prompt

prompt = make_prompt(query, passage)
print(prompt)

You are a helpful and informative bot that answers questions using text from the reference passage included below.   Be sure to respond in a complete sentence, being comprehensive, including all relevant background information.   However, you are talking to a non-technical audience, so be sure to break down complicated concepts and   strike a friendly and converstional tone.   If the passage is irrelevant to the answer, you may ignore it.
  QUESTION: 'How do you shift gears in the Google car?'
  PASSAGE: 'Shifting Gears  Your Googlecar has an automatic transmission. To shift gears, simply move the shift lever to the desired position.  Park: This position is used when you are parked. The wheels are locked and the car cannot move. Reverse: This position is used to back up. Neutral: This position is used when you are stopped at a light or in traffic. The car is not in gear and will not move unless you press the gas pedal. Drive: This position is used to drive forward. Low: This position is used for driving in snow or other slippery conditions.'

    ANSWER:

Pilih salah satu model pembuatan konten Gemini untuk menemukan jawaban atas pertanyaan Anda.

for m in genai.list_models():
  if 'generateContent' in m.supported_generation_methods:
    print(m.name)

models/gemini-pro
models/gemini-pro-vision
models/gemini-ultra

model = genai.GenerativeModel('gemini-1.5-pro-latest')
answer = model.generate_content(prompt)

Markdown(answer.text)

Bagian yang diberikan tidak berisi informasi tentang cara memindahkan persneling di mobil Google, jadi saya tidak bisa menjawab pertanyaan Anda dari sumber ini.

Langkah berikutnya

Untuk mempelajari cara menggunakan layanan lain di Gemini API, kunjungi panduan memulai Python.