docs: update code example for Scrapy guide (#410)

Author: vdusek

docs/02_guides/code/scrapy_project/src/__main__.py

@@ -1,10 +1,10 @@
 from __future__ import annotations
 
-from twisted.internet import asyncioreactor
+from scrapy.utils.reactor import install_reactor
 
 # Install Twisted's asyncio reactor before importing any other Twisted or
 # Scrapy components.
-asyncioreactor.install()  # type: ignore[no-untyped-call]
+install_reactor('twisted.internet.asyncioreactor.AsyncioSelectorReactor')
 
 import os
 

docs/02_guides/code/scrapy_project/src/settings.py

@@ -5,4 +5,5 @@
 ROBOTSTXT_OBEY = True
 SPIDER_MODULES = ['src.spiders']
 TELNETCONSOLE_ENABLED = False
+# Do not change the Twisted reactor unless you really know what you are doing.
 TWISTED_REACTOR = 'twisted.internet.asyncioreactor.AsyncioSelectorReactor'

docs/02_guides/code/scrapy_project/src/spiders/__init__.py

@@ -1 +1,3 @@
 from .title import TitleSpider
+
+__all__ = ['TitleSpider']

docs/02_guides/code/scrapy_project/src/spiders/title.py

@@ -10,7 +10,7 @@
 if TYPE_CHECKING:
     from collections.abc import Generator
 
-    from scrapy.responsetypes import Response
+    from scrapy.http.response import Response
 
 
 class TitleSpider(Spider):