How to make a thread safe tag?

Question

Django

I want to start with a simple increment in the template.
Wrote a tag, he added a unit to "himself", wrote the tag again, he added a unit to himself again.
BUT there is a doubt - a bunch of users went to the page and summed up ... :)
How to make it thread-safe?
PS (maybe I misunderstand something and my doubts are in vain - please clarify)

Answer 1

The template, and the tag is about the output of information. No need to make a tag that changes its state for some reason.

Answer 2

Install redis and store your counters in it!

Answer 3

In yourself - where is it? Django is single threaded. But the WSGI server often runs it in multiple processes, so there shouldn't be any shared state anywhere other than the database.