Concevoir des systèmes agentiques avec LangChain
Dilini K. Sumanapala, PhD
Founder & AI Engineer, Genverv, Ltd.

- Agent : [Outil 1 : réponse]
- Agent : [Outil 2 : réponse]
- Utilisateur : [Requête]
- Agent : [Outil 1 : réponse]
- Utilisateur : [Relance]
- Agent : [Outil 1 : réponse à la relance]
from langchain_core.messages import AIMessage, HumanMessageconfig = {"configurable": {"thread_id": "1"}}# Créer le message d'entrée avec la requête de l'utilisateur def multi_tool_output(query):inputs = {"messages": [HumanMessage(content=query)]}# Diffuser en continu les messages et métadonnées de l'application de clavardeur for msg, metadata in app.stream(inputs, config, stream_mode="messages"):# Vérifier que le message a du contenu et ne vient pas d'un humain if msg.content and not isinstance(msg, HumanMessage): print(msg.content, end="", flush=True)print("\n")
multi_tool_output("Is `Stella won no wallets` a palindrome?")multi_tool_output("What happened on April 12th, 1955?")
The phrase or word 'Stella won no wallets' is a palindrome.Yes, the phrase "Stella won no wallets" is a palindrome.April 12th, 1955, is notable for several reasons, particularly in the context of science and technology. On this date, the first successful polio vaccine developed by Dr. Jonas Salk was announced to the public. This vaccine was a significant breakthrough in the fight against poliomyelitis, a disease that had caused widespread fear and numerous outbreaks, particularly affecting children. The announcement marked a turning point in public health and led to widespread vaccination campaigns that ultimately contributed to the near-eradication of polio...
# Afficher d'abord la requête de l'utilisateur à chaque interaction def user_agent_multiturn(queries): for query in queries: print(f"User: {query}")# Diffuser en continu les messages liés aux requêtes, sans les métadonnées print("Agent: " + "".join(msg.content for msg, metadata in app.stream( {"messages": [HumanMessage(content=query)]}, config, stream_mode="messages")# Exclure les messages humains pour n'imprimer que ceux de l'agent if msg.content and not isinstance(msg, HumanMessage)) + "\n")queries = ["What happened on the 12 April 1961?", "What about 10 December 1948?", "Is `Mr. Owl ate my metal worm?` a palindrome?", "What about 'palladium stadium?'"] user_agent_multiturn(queries)
User: What happened on the 12 April 1961?
Agent: On April 12, 1961, Yuri Gagarin, a Soviet cosmonaut, became the first human to travel
into space aboard the Vostok 1 spacecraft...
User: What about 22 November 1963?
Agent: December 10, 1948... marks the Universal Declaration of Human Rights (UDHR).
User: Is `Mr. Owl ate my metal worm?` a palindrome?
Agent: The phrase or word 'Mr. Owl ate my metal worm?' is a palindrome...
User: What about 'palladium stadium'?
Agent: No, the phrase `palladium stadium` is not a palindrome...
Concevoir des systèmes agentiques avec LangChain