Exceptions¶

Built-in Exceptions reference¶

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

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

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')

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

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

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.

This exception is raised to indicate an unsupported feature.