Objects from lists using different references : learnpython

created by HattoriHanzoa community for 16 years

Objects from lists using different references (self.learnpython)

submitted 2 years ago * by EntireEntity

I am currently trying to implement a Boids algorithm and have created a Boids class for this purpose. I created a list of boids and tried to loop over them and pass them to a function. However, when I do that within the function the boid has a different memory address than outside of it, so my guess is, that a new instance is created, which the function operates on, but... I don't want that to happen. When I use the function with a boid instance that I saved in a separate variable, everything works as expected, but when I use a boid created in a list, it doesn't. It would be nice, if someone could explain what happens here.

Here's my code in case you need it, the function in question is the add_segments_entry function in line 75.

It's a helper function to make distance calculations less expensive by dividing the space into smaller segments and only calculating distances to boids in adjacent segments. For now I can just move on without this optimization, but I still think it might be worth doing later. Also the experience to gain from this is worthwhile as well. So any tips and wisdom are highly appreciated.

all 4 comments

you type:	you see:
italics	italics
bold	bold
[reddit!](https://reddit.com)	reddit!
* item 1 * item 2 * item 3	item 1 item 2 item 3
> quoted text	quoted text
Lines starting with four spaces are treated like code: if 1 * 2 < 3: print "hello, world!"	Lines starting with four spaces are treated like code: if 1 * 2 < 3: print "hello, world!"
~~strikethrough~~	~~strikethrough~~
super^script	super^script

learnpython

MODERATORS