RuntimeWarning: overflow encountered in long_scalars h = 12.0 / (totaln * (totaln + 1)) * ssbn - 3

描述：

使用stats.kruskal()计算Kruskal-Wallis 秩和检验，数据量2042000条，所以计算的时候，警告内存溢出。

RuntimeWarning: overflow encountered in long_scalars   
h = 12.0 / (totaln * (totaln + 1)) * ssbn - 3

问题就出在 h = 12.0 / (totaln * (totaln + 1)) * ssbn - 3这一行代码，
(totaln * (totaln + 1))，计算的结果太大了，只需要更改运算顺序即可

h = 12.0 / (totaln * (totaln + 1)) * ssbn - 3 * (totaln + 1)  # 原代码

h = (ssbn / totaln) / (totaln + 1) * 12.0 - 3 * (totaln + 1)  # 修改了运算顺序

将原代码注释掉，更改为h = (ssbn / totaln) / (totaln + 1) * 12.0 - 3 * (totaln + 1)即可解决问题。