golang是否等效于此Python短路习惯用法“ z = x或y”

In Python z = x or y can be understood as assign z as if x is falsey, then y, else x, is there a similar idiom in golang?

Specifically the two variables on the right are strings, I'd like to assign the first if it's non-emtpy, otherwise the second.

No, you have to use if/else:

s1, s2 := "", "hello"
var x string

if s1 == "" {
    x = s2
} else {
    x = s1
}