Générer des réponses de clavardeur

Concevoir des systèmes agentiques avec LangChain

Dilini K. Sumanapala, PhD

Founder & AI Engineer, Genverv, Ltd.

Diffuser les événements du graphe

   

  • Diffuser les événements en temps réel

  • Chaque événement est une étape du flux de travaux

  • Suivre les réponses et les appels d'outils

  • Suivre la progression du clavardeur

User: Where is the Congo?

Agent: Let me check some details 
       for you...

Agent: AIMessage([Tool Call to 
       Google Maps] Searching for 
       information on "the Congo")

Agent: The Democratic Republic of 
       Congo is a country in 
       Central Africa.
Concevoir des systèmes agentiques avec LangChain

Diffuser les réponses du LLM

# Define a function to execute the chatbot based on user input
def stream_graph_updates(user_input: str):


    # Start streaming events from the graph with the user's input
    for event in graph.stream({"messages": [("user", user_input)]}):


        # Retrieve and print the chatbot node responses
        for value in event.values():
            print("Agent:", value["messages"])


# Define the user query and run the chatbot
user_query = "Who is Mary Shelley?"
stream_graph_updates(user_query)
Concevoir des systèmes agentiques avec LangChain

Diffuser les réponses du LLM

   Agent: [AIMessage(content='Mary Shelley (1797-1851) was an English 
   novelist...

   ...best known for her groundbreaking work in the Gothic genre, 
   particularly for her novel "Frankenstein; or, The Modern Prometheus," 
   published in 1818. This novel is often considered one of the earliest 
   examples of science fiction and explores themes of creation, 
   responsibility, and the nature of humanity through the story of Victor 
   Frankenstein, a scientist who creates a sentient creature in an 
   unorthodox experiment...',

   response_metadata={'finish_reason': 'stop', 'model_name': 
   'gpt-4o-mini-...')]
Concevoir des systèmes agentiques avec LangChain

LLM et hallucinations

Agent: [AIMessage(content='Judith 
Love Cohen was an American aerospace 
engineer, and worked on various 
space missions, including the Apollo 
program... Cohen was also the mother 
of actor and writer Adam Cohen, 
who has spoken about her influence on 
his life and career. 
additional_kwargs={}, 
response_metadata={'finish_reason': 
'stop', 'model_name': 
'gpt-4o-mini-...)

   

Exemple d'hallucination

 

  • Le fils célèbre de Judith Love Cohen est Jack Black, pas « Adam Cohen ».
Concevoir des systèmes agentiques avec LangChain

Générer un diagramme LangGraph

# Import modules for chatbot diagram
from IPython.display import 
Image, display


# Try generating and displaying 
# the graph diagram
try:
    display(Image(graph.get_graph()
    .draw_mermaid_png()))


# Return an exception if necessary  
except Exception:
    print("Additional dependencies 
    required.")

Diagramme LangGraph d'un clavardeur de base.

Concevoir des systèmes agentiques avec LangChain

Passons à la pratique !

Concevoir des systèmes agentiques avec LangChain

Preparing Video For Download...