A question regarding string instance uniqueness in python

Question

I was trying to figure out which integers python only instantiates once (-6 to 256 it seems), and in the process stumbled on some string behaviour I can\'t see the pattern i

Answer 1

I believe short strings that can be evaluated at compile time, will be interned automatically. In the last examples, the result can't be evaluated at compile time because str or join might be redefined.