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Added the missing dot. (+1 squashed commit) Squashed commits: [2198972] Update exceptions.rst There are namely no constructors in classes in Python but an ``__init__`` method instead.
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72 lines
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ReStructuredText
.. _topics-exceptions:
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==========
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Exceptions
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==========
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.. module:: scrapy.exceptions
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:synopsis: Scrapy exceptions
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.. _topics-exceptions-ref:
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Built-in Exceptions reference
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=============================
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Here's a list of all exceptions included in Scrapy and their usage.
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DropItem
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--------
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.. exception:: DropItem
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The exception that must be raised by item pipeline stages to stop processing an
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Item. For more information see :ref:`topics-item-pipeline`.
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CloseSpider
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-----------
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.. exception:: CloseSpider(reason='cancelled')
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This exception can be raised from a spider callback to request the spider to be
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closed/stopped. Supported arguments:
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:param reason: the reason for closing
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:type reason: str
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For example::
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def parse_page(self, response):
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if 'Bandwidth exceeded' in response.body:
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raise CloseSpider('bandwidth_exceeded')
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IgnoreRequest
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-------------
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.. exception:: IgnoreRequest
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This exception can be raised by the Scheduler or any downloader middleware to
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indicate that the request should be ignored.
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NotConfigured
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-------------
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.. exception:: NotConfigured
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This exception can be raised by some components to indicate that they will
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remain disabled. Those components include:
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* Extensions
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* Item pipelines
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* Downloader middlewares
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* Spider middlewares
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The exception must be raised in the component's ``__init__`` method.
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NotSupported
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------------
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.. exception:: NotSupported
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This exception is raised to indicate an unsupported feature.
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