# Exceptions

## Built-in Exceptions reference

Here’s a list of all exceptions included in Scrapy and their usage.

### DropItem

exception `scrapy.exceptions.``DropItem`

The exception that must be raised by item pipeline stages to stop processing an Item. For more information see Item Pipeline.

### CloseSpider

exception `scrapy.exceptions.``CloseSpider`(reason='cancelled')

  This exception can be raised from a spider callback to request the spider to be closed/stopped. Supported arguments:

  Parameters: | reason (str) – the reason for closing

For example:

    def parse_page(self, response):
        if 'Bandwidth exceeded' in response.body:
            raise CloseSpider('bandwidth_exceeded')

### DontCloseSpider

exception `scrapy.exceptions.``DontCloseSpider`

This exception can be raised in a `spider_idle` signal handler to prevent the spider from being closed.

### IgnoreRequest

exception `scrapy.exceptions.``IgnoreRequest`

This exception can be raised by the Scheduler or any downloader middleware to indicate that the request should be ignored.

### NotConfigured

exception `scrapy.exceptions.``NotConfigured`

This exception can be raised by some components to indicate that they will remain disabled. Those components include:

> - Extensions
> - Item pipelines
> - Downloader middlewares
> - Spider middlewares

The exception must be raised in the component’s `__init__` method.

### NotSupported

exception `scrapy.exceptions.``NotSupported`

This exception is raised to indicate an unsupported feature.