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.. _topics-scheduler:
=========
Scheduler
=========
.. module:: scrapy.core.scheduler
The scheduler component receives requests from the :ref:`engine <component-engine>`
and stores them into persistent and/or non-persistent data structures.
It also gets those requests and feeds them back to the engine when it
asks for a next request to be downloaded.
Overriding the default scheduler
================================
You can use your own custom scheduler class by supplying its full
Python path in the :setting:`SCHEDULER` setting.
Minimal scheduler interface
===========================
.. autoclass:: BaseScheduler
:members:
Default scheduler
=================
.. autoclass:: Scheduler()
:members:
:special-members: __init__, __len__
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