在Go中用格式说明符声明变量

In Python, I can declare a variable as d ='/some/dir/%s' and later replace %s with any value as

>>> d =  '/some/dir/%s'
>>> d % "hello"
'/some/dir/hello'

Is it possible to do the same in Go? If so, how?

Yes, fmt.Sprintf does that:

d := "/some/dir/%s"
fmt.Sprintf(d, "hello") // Returns "/some/dir/hello"