Does urllib implement DNS caching?

version: python3.6
because I remember reading in a blog that urllib implemented DNS caching, but now I can"t find the original post.
so I read the source code of urllib"s request.py, especially urllib.request.urlopen () and its internal calling methods, and couldn"t find any code related to DNS caching.
I don"t know if I don"t understand it or the related code is not in request.py, or urllib just doesn"t implement DNS caching. Has anyone studied this problem?

Urllib web-crawler dns python
Apr.09,2021

Previous: How to configure multiple redis? to receive logs for filebeat

Next: Puppeteer cannot set cookie?

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e473bf-665bb.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e473bf-665bb.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?