Is it possible to change the main loop variable from a thread?

Question

Python

Good day. I have a script that works like this:

1. Infinite Loop
1.1. Execution of function #1, which changes the value of the variable to True/False.
1.2 If True, then I perform function No. 2.

My task is to call function #2 as often as possible. After some thought, I decided that if function #1 is moved to a separate thread, then function #2 will be called more often, because it does not wait for function #1 to be executed. But how can I change the main loop variable in the thread that executes function #1, where function #2 is located?

PS I know that python and speed are a dubious duo, but still. If you have other options for increasing the frequency of the function call # 2, I will be glad to get acquainted with them.

Answer 1

Threads share a single address space, so that they share variables, there is no problem with changing them.
PS Python and speed are commonplace. Statements to the contrary are questionable.