# Using Gemini for batch inference

You can use **Gemini** for batch inference in **Curator** to generate  synthetic data. In this example, we will generate reannotation of wildchat dataset, but the approach can be adapted for any data generation task.

## **Prerequisites**

* **Python 3.10+**
* **Curator**: Install via `pip install bespokelabs-curator`
* **Gemini (Vertex AI):**  GCP account with Vertex AI enabled.
* **Google Cloud Bucket**: Access to cloud storage.

## **Steps**

#### **1. Setup environment vars**

```sh
export GOOGLE_CLOUD_REGION=us-central1
export GOOGLE_CLOUD_PROJECT=<projectname>
export GEMINI_BUCKET_NAME=<bucketname>
export GEMINI_API_KEY=<your_api_key>
```

#### **2.  ADC authentication**

```sh
gcloud auth application-default login
```

#### **3.  Create a curator.LLM subclass**

Create a class that inherits from `curator.LLM`. Implement two key methods:

* `prompt()`: Generates the prompt for the LLM.
* `parse()`: Processes the LLM's response into your desired format.

Here’s the implementation:

```python
"""Example of reannotating the WildChat dataset using curator."""

import logging
from bespokelabs import curator

# To see more detail about how batches are being processed
logger = logging.getLogger("bespokelabs.curator")
logger.setLevel(logging.INFO)


class WildChatReannotator(curator.LLM):
    """A reannotator for the WildChat dataset."""

    def prompt(self, input: dict) -> str:
        """Extract the first message from a conversation to use as the prompt."""
        return input["conversation"][0]["content"]

    def parse(self, input: dict, response: str) -> dict:
        """Parse the model response along with the input to the model into the desired output format.."""
        instruction = input["conversation"][0]["content"]
        return {"instruction": instruction, "new_response": response}

```

#### **3. Configure the Gemini Backend**

```python
distiller = WildChatReannotator(model_name="gemini-1.5-flash-002", 
                                backend="gemini", 
                                batch=True 
                                )
```

#### **4. Generate Data**

Generate the structured data and output the results as a pandas DataFrame:

```python
from datasets import load_dataset
dataset = load_dataset("allenai/WildChat", split="train")
dataset = dataset.select(range(100))

distilled_dataset = distiller(dataset)
print(distilled_dataset.dataset)
print(distilled_dataset.dataset[0])
```

### **Example Output**

Using the above example, the output might look like this:

| instruction                                       | new\_response                                   |
| ------------------------------------------------- | ----------------------------------------------- |
| Write a very long, elaborate, descriptive and ... | Scene: Omelette Apocalypse\n\n\*\*INT. DINER... |
| what are you?                                     | I am a large language model, trained by Google  |

## **Gemini Batch Configuration**

* Check out complete [batch configuration ](https://docs.bespokelabs.ai/bespoke-curator/api-reference/llm-api-documentation#batch-processing-parameters)
* Check out Gemini [generation parameters](https://cloud.google.com/vertex-ai/generative-ai/docs/reference/python/latest/vertexai.generative_models.GenerationConfig)&#x20;


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