Is python memory shared between theads?

[Wesley Henwood]

So I declare a variable named A in thread1, in script1.py.  I assign
the value of 2.5 to A.  I then run script2.py in thread2.  Script2.py
assigns the value of 5.5 to a variable named A.  Now, when thread1
resums execution, I see that A = 5.5, rather than 2.5 as I expected.

Is this normal behavior?  Based on the little documentation I have been
able to find on this topic, it is normal behavior.  The only way to use
same-named variables in scripts is to have them run in a different
process, rather than different threads.