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Merge pull request #5014 from jpmckinney/patch-1 

docs: Clarify there's one extension instance per crawler
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Mikhail Korobov 2021-04-01 22:26:20 +05:00 committed by GitHub
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7
docs/topics/extensions.rst
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@ -7,8 +7,7 @@ Extensions
The extensions framework provides a mechanism for inserting your own
custom functionality into Scrapy.
Extensions are just regular classes that are instantiated at Scrapy startup,
when extensions are initialized.
Extensions are just regular classes.
Extension settings
==================
@ -27,8 +26,8 @@ Loading & activating extensions
===============================
Extensions are loaded and activated at startup by instantiating a single
instance of the extension class. Therefore, all the extension initialization
code must be performed in the class ``__init__`` method.
instance of the extension class per spider being run. All the extension
initialization code must be performed in the class ``__init__`` method.
To make an extension available, add it to the :setting:`EXTENSIONS` setting in
your Scrapy settings. In :setting:`EXTENSIONS`, each extension is represented