ChatPerplexity
本筆記本涵蓋如何開始使用 Perplexity 聊天模型。
from langchain_community.chat_models import ChatPerplexity
from langchain_core.prompts import ChatPromptTemplate
API 參考：ChatPerplexity | ChatPromptTemplate
提供的程式碼假設您的 PPLX_API_KEY 已在您的環境變數中設定。如果您想要手動指定您的 API 金鑰，並且也選擇不同的模型，您可以使用以下程式碼
chat = ChatPerplexity(
temperature=0, pplx_api_key="YOUR_API_KEY", model="llama-3-sonar-small-32k-online"
)
提供的程式碼假設您的 PPLX_API_KEY 已在您的環境變數中設定。如果您想要手動指定您的 API 金鑰，並且也選擇不同的模型，您可以使用以下程式碼
chat = ChatPerplexity(temperature=0, pplx_api_key="YOUR_API_KEY", model="llama-3.1-sonar-small-128k-online")
您可以在此處查看可用模型的列表。為了可重現性，我們可以透過在本筆記本中將 API 金鑰作為輸入來動態設定它。
import os
from getpass import getpass
PPLX_API_KEY = getpass()
os.environ["PPLX_API_KEY"] = PPLX_API_KEY
chat = ChatPerplexity(temperature=0, model="llama-3.1-sonar-small-128k-online")
system = "You are a helpful assistant."
human = "{input}"
prompt = ChatPromptTemplate.from_messages([("system", system), ("human", human)])
chain = prompt | chat
response = chain.invoke({"input": "Why is the Higgs Boson important?"})
response.content
'The Higgs Boson is an elementary subatomic particle that plays a crucial role in the Standard Model of particle physics, which accounts for three of the four fundamental forces governing the behavior of our universe: the strong and weak nuclear forces, electromagnetism, and gravity. The Higgs Boson is important for several reasons:\n\n1. **Final Elementary Particle**: The Higgs Boson is the last elementary particle waiting to be discovered under the Standard Model. Its detection helps complete the Standard Model and further our understanding of the fundamental forces in the universe.\n\n2. **Mass Generation**: The Higgs Boson is responsible for giving mass to other particles, a process that occurs through its interaction with the Higgs field. This mass generation is essential for the formation of atoms, molecules, and the visible matter we observe in the universe.\n\n3. **Implications for New Physics**: While the detection of the Higgs Boson has confirmed many aspects of the Standard Model, it also opens up new possibilities for discoveries beyond the Standard Model. Further research on the Higgs Boson could reveal insights into the nature of dark matter, supersymmetry, and other exotic phenomena.\n\n4. **Advancements in Technology**: The search for the Higgs Boson has led to significant advancements in technology, such as the development of artificial intelligence and machine learning algorithms used in particle accelerators like the Large Hadron Collider (LHC). These advancements have not only contributed to the discovery of the Higgs Boson but also have potential applications in various other fields.\n\nIn summary, the Higgs Boson is important because it completes the Standard Model, plays a crucial role in mass generation, hints at new physics phenomena beyond the Standard Model, and drives advancements in technology.\n'
您可以像平常一樣格式化和建構提示。在以下範例中，我們要求模型告訴我們一個關於貓的笑話。
chat = ChatPerplexity(temperature=0, model="llama-3.1-sonar-small-128k-online")
prompt = ChatPromptTemplate.from_messages([("human", "Tell me a joke about {topic}")])
chain = prompt | chat
response = chain.invoke({"topic": "cats"})
response.content
'Here\'s a joke about cats:\n\nWhy did the cat want math lessons from a mermaid?\n\nBecause it couldn\'t find its "core purpose" in life!\n\nRemember, cats are unique and fascinating creatures, and each one has its own special traits and abilities. While some may see them as mysterious or even a bit aloof, they are still beloved pets that bring joy and companionship to their owners. So, if your cat ever seeks guidance from a mermaid, just remember that they are on their own journey to self-discovery!\n'
ChatPerplexity 也支援串流功能：
chat = ChatPerplexity(temperature=0.7, model="llama-3.1-sonar-small-128k-online")
prompt = ChatPromptTemplate.from_messages(
[("human", "Give me a list of famous tourist attractions in Pakistan")]
)
chain = prompt | chat
for chunk in chain.stream({}):
print(chunk.content, end="", flush=True)
Here is a list of some famous tourist attractions in Pakistan:
1. **Minar-e-Pakistan**: A 62-meter high minaret in Lahore that represents the history of Pakistan.
2. **Badshahi Mosque**: A historic mosque in Lahore with a capacity of 10,000 worshippers.
3. **Shalimar Gardens**: A beautiful garden in Lahore with landscaped grounds and a series of cascading pools.
4. **Pakistan Monument**: A national monument in Islamabad representing the four provinces and three districts of Pakistan.
5. **National Museum of Pakistan**: A museum in Karachi showcasing the country's cultural history.
6. **Faisal Mosque**: A large mosque in Islamabad that can accommodate up to 300,000 worshippers.
7. **Clifton Beach**: A popular beach in Karachi offering water activities and recreational facilities.
8. **Kartarpur Corridor**: A visa-free border crossing and religious corridor connecting Gurdwara Darbar Sahib in Pakistan to Gurudwara Sri Kartarpur Sahib in India.
9. **Mohenjo-daro**: An ancient Indus Valley civilization site in Sindh, Pakistan, dating back to around 2500 BCE.
10. **Hunza Valley**: A picturesque valley in Gilgit-Baltistan known for its stunning mountain scenery and unique culture.
These attractions showcase the rich history, diverse culture, and natural beauty of Pakistan, making them popular destinations for both local and international tourists.