W: Lint/ void :用于void上下文的文字<-DOC

Question

守则如下：

def stratified_subsampling(arr, n_strata, n_points, srand)
  <<-DOC
  The function samples "n_points" points from an array "arr".
  It preserves the original distribution of the data. "n_strata"
  is the number of strata to devide the values in. Have to find a
  trade-off for this value, but I think that as a rule of thumb,
  10 bins should be fair enough in most cases.
  DOC

  vs = arr.sort
...

鲁博克说：

W: Lint/Void: Literal <<-DOC used in void context.
  <<-DOC
  ^^^^^^   

我不明白这意味着什么，我应该如何解决它。

谢谢!

Answer 1

这意味着您这里有一个字符串文本，您完全不使用它。它需要是字符串文字吗？一个评论应该是很好的。