The Infamous Python "Glitch"
default values in Python functions have what seems to be a strange quirk about them, that has cost many developers many hours of work.
The quirk is that modifying a default parameter, that is a mutable object, will modify that default parameter forever. For example, if I have an empty list as a default parameter, and I append to that list in the function, then the NEXT TIME I run that function, the default parameter will be different. Crazy! Find out why this is by watching this short.
Let me tell you my experience with these default values. When I was doing a LeetCode question once, I used a default parameter (if i remember correctly, for memoization). I kept getting different results when I ran the code versus when LeetCode ran my test cases. So I would look at the individual test cases that my code failed on, and I'd take them and run them myself – but they would work when I ran them! The problem was that LeetCode was running the function multiple times in a test, and my function was modifying its default parameters, so it was acting differently each time.
#programming
On this page of the site you can watch the video online The Infamous Python "Glitch" with a duration of hours minute second in good quality, which was uploaded by the user Red Black Tech 09 March 2024, share the link with friends and acquaintances, this video has already been watched 807 times on youtube and it was liked by 21 viewers. Enjoy your viewing!
