How does python operator precedence work with double comparisons?

Question

-3<-2<-1 returns True.

However I would expect it interpreted as

(-3<-2)<-1
True<-1
1<-1
False

How is that possible ?

Answer 1

This is a chained comparison. Instead of being left-associative like (-3 < -2) < -1 or right-associative like -3 < (-2 < -1), it's actually treated as

(-3 < -2) and (-2 < -1)

except that -2 is evaluated at most once.