> ## Documentation Index
> Fetch the complete documentation index at: https://docs.keywordsai.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Function calling

> This is the guide for how to use function calling in Keywords AI

Function calling is a feature that allows you to call a function from a model. This is useful to call a function from a model and get the result.

Here's the guide for how to use function calling in Keywords AI.

```Python Functions.py theme={"system"}
from openai import OpenAI
client = OpenAI(
    base_url="https://api.keywordsai.co/api/",
    api_key="YOUR_KEYWORDSAI_API_KEY",
)

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"]},
        },
        "required": ["location"],
      },
    }
  }
]
messages = [{"role": "user", "content": "What's the weather like in Boston today?"}]
completion = client.chat.completions.create(
  model="gpt-4o",
  messages=messages,
  tools=tools,
  tool_choice="auto"
)
print(completion)
```