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

# Camel.extractors.base

<a id="camel.extractors.base" />

<a id="camel.extractors.base.BaseExtractorStrategy" />

## BaseExtractorStrategy

```python theme={"system"}
class BaseExtractorStrategy(ABC):
```

Abstract base class for extraction strategies.

<a id="camel.extractors.base.BaseExtractor" />

## BaseExtractor

```python theme={"system"}
class BaseExtractor:
```

Base class for response extractors with a fixed strategy pipeline.

This extractor:

* Uses a **fixed multi-stage pipeline** of extraction strategies.
* Tries **each strategy in order** within a stage until one succeeds.
* Feeds the **output of one stage into the next** for processing.
* Supports **async execution** for efficient processing.
* Provides **batch processing and resource monitoring** options.

<a id="camel.extractors.base.BaseExtractor.__init__" />

### **init**

```python theme={"system"}
def __init__(
    self,
    pipeline: List[List[BaseExtractorStrategy]],
    cache_templates: bool = True,
    max_cache_size: int = 1000,
    extraction_timeout: float = 30.0,
    batch_size: int = 10,
    monitoring_interval: float = 5.0,
    cpu_threshold: float = 80.0,
    memory_threshold: float = 85.0,
    **kwargs
):
```

Initialize the extractor with a multi-stage strategy pipeline.

**Parameters:**

* **pipeline** (List\[List\[BaseExtractorStrategy]]): A fixed list of lists where each list represents a stage containing extractor strategies executed in order.
* **cache\_templates** (bool): Whether to cache extraction templates. (default: :obj:`True`)
* **max\_cache\_size** (int): Maximum number of templates to cache. (default: :obj:`1000`)
* **extraction\_timeout** (float): Maximum time for extraction in seconds. (default: :obj:`30.0`)
* **batch\_size** (int): Size of batches for parallel extraction. (default: :obj:`10`)
* **monitoring\_interval** (float): Interval in seconds between resource checks. (default: :obj:`5.0`)
* **cpu\_threshold** (float): CPU usage percentage threshold for scaling down. (default: :obj:`80.0`)
* **memory\_threshold** (float): Memory usage percentage threshold for scaling down. (default: :obj:`85.0`) \*\*kwargs: Additional extractor parameters.