import getpass
import os

os.environ["DATABRICKS_HOST"]="https://your-workspace.cloud.databricks.com"
if"DATABRICKS_TOKEN"notin os.environ:
    os.environ["DATABRICKS_TOKEN"]= getpass.getpass(
"Enter your Databricks access token: "
)

Enter your Databricks access token:  ········

%pip install-qU databricks-langchain

from databricks_langchainimport ChatDatabricks

chat_model= ChatDatabricks(
    endpoint="databricks-dbrx-instruct",
    temperature=0.1,
    max_tokens=256,
# See https://python.langchain.com/api_reference/community/chat_models/langchain_community.chat_models.databricks.ChatDatabricks.html for other supported parameters
)

chat_model.invoke("What is MLflow?")

AIMessage(content='MLflow is an open-source platform for managing end-to-end machine learning workflows. It was introduced by Databricks in 2018. MLflow provides tools for tracking experiments, packaging and sharing code, and deploying models. It is designed to work with any machine learning library and can be used in a variety of environments, including local machines, virtual machines, and cloud-based clusters. MLflow aims to streamline the machine learning development lifecycle, making it easier for data scientists and engineers to collaborate and deploy models into production.', response_metadata={'prompt_tokens': 229, 'completion_tokens': 104, 'total_tokens': 333}, id='run-d3fb4d06-3e10-4471-83c9-c282cc62b74d-0')

# You can also pass a list of messages
messages=[
("system","You are a chatbot that can answer questions about Databricks."),
("user","What is Databricks Model Serving?"),
]
chat_model.invoke(messages)

AIMessage(content='Databricks Model Serving is a feature of the Databricks platform that allows data scientists and engineers to easily deploy machine learning models into production. With Model Serving, you can host, manage, and serve machine learning models as APIs, making it easy to integrate them into applications and business processes. It supports a variety of popular machine learning frameworks, including TensorFlow, PyTorch, and scikit-learn, and provides tools for monitoring and managing the performance of deployed models. Model Serving is designed to be scalable, secure, and easy to use, making it a great choice for organizations that want to quickly and efficiently deploy machine learning models into production.', response_metadata={'prompt_tokens': 35, 'completion_tokens': 130, 'total_tokens': 165}, id='run-b3feea21-223e-4105-8627-41d647d5ccab-0')

from langchain_core.promptsimport ChatPromptTemplate

prompt= ChatPromptTemplate.from_messages(
[
(
"system",
"You are a chatbot that can answer questions about {topic}.",
),
("user","{question}"),
]
)

chain= prompt| chat_model
chain.invoke(
{
"topic":"Databricks",
"question":"What is Unity Catalog?",
}
)

AIMessage(content="Unity Catalog is a new data catalog feature in Databricks that allows you to discover, manage, and govern all your data assets across your data landscape, including data lakes, data warehouses, and data marts. It provides a centralized repository for storing and managing metadata, data lineage, and access controls for all your data assets. Unity Catalog enables data teams to easily discover and access the data they need, while ensuring compliance with data privacy and security regulations. It is designed to work seamlessly with Databricks' Lakehouse platform, providing a unified experience for managing and analyzing all your data.", response_metadata={'prompt_tokens': 32, 'completion_tokens': 118, 'total_tokens': 150}, id='run-82d72624-f8df-4c0d-a976-919feec09a55-0')

for chunkin chat_model.stream("How are you?"):
print(chunk.content, end="|")

I|'m| an| AI| and| don|'t| have| feelings|,| but| I|'m| here| and| ready| to| assist| you|.| How| can| I| help| you| today|?||

import asyncio

country=["Japan","Italy","Australia"]
futures=[chat_model.ainvoke(f"Where is the capital of{c}?")for cin country]
await asyncio.gather(*futures)

{
    "name": "...",
    "description": "...",
    "parameters": {...}  # JSONSchema
}

from pydanticimport BaseModel, Field


classGetWeather(BaseModel):
"""Get the current weather in a given location"""

    location:str= Field(..., description="The city and state, e.g. San Francisco, CA")


classGetPopulation(BaseModel):
"""Get the current population in a given location"""

    location:str= Field(..., description="The city and state, e.g. San Francisco, CA")


llm_with_tools= chat_model.bind_tools([GetWeather, GetPopulation])
ai_msg= llm_with_tools.invoke(
"Which city is hotter today and which is bigger: LA or NY?"
)
print(ai_msg.tool_calls)

chat_model_custom= ChatDatabricks(
    endpoint="YOUR_ENDPOINT_NAME",
    temperature=0.1,
    max_tokens=256,
)

chat_model_custom.invoke("How are you?")

# Replace `<scope>` with your scope
databricks secrets create-scope <scope>
databricks secrets put-secret <scope> openai-api-key --string-value $OPENAI_API_KEY

from mlflow.deploymentsimport get_deploy_client

client= get_deploy_client("databricks")

secret="secrets/<scope>/openai-api-key"# replace `<scope>` with your scope
endpoint_name="my-chat"# rename this if my-chat already exists
client.create_endpoint(
    name=endpoint_name,
    config={
"served_entities":[
{
"name":"my-chat",
"external_model":{
"name":"gpt-3.5-turbo",
"provider":"openai",
"task":"llm/v1/chat",
"openai_config":{
"openai_api_key":"{{"+ secret+"}}",
},
},
}
],
},
)

chat_model_external= ChatDatabricks(
    endpoint=endpoint_name,
    temperature=0.1,
    max_tokens=256,
)
chat_model_external.invoke("How to use Databricks?")

llm= ChatDatabricks(endpoint="databricks-meta-llama-3-70b-instruct")
tools=[
{
"type":"function",
"function":{
"name":"get_current_weather",
"description":"Get the current weather in a given location",
"parameters":{
"type":"object",
"properties":{
"location":{
"type":"string",
"description":"The city and state, e.g. San Francisco, CA",
},
"unit":{"type":"string","enum":["celsius","fahrenheit"]},
},
},
},
}
]

# supported tool_choice values: "auto", "required", "none", function name in string format,
# or a dictionary as {"type": "function", "function": {"name": <<tool_name>>}}
model= llm.bind_tools(tools, tool_choice="auto")

messages=[{"role":"user","content":"What is the current temperature of Chicago?"}]
print(model.invoke(messages))