变化指数线数据帧

Question

df是数据帧>

我有一个数据帧和 我想改变行索引的名字 请指导我如何能得到这个？

df1=pd.concat(infg) 

print df1 

     A18   A19   A20 
Peak 213.164273 319.549715 198.585854 
Peak 153.412569 349.485482 145.959831 
Peak 125.797093 358.592932 124.882848 
Peak 198.156800 327.608988 185.250738 
Peak 148.445582 351.232905 141.896721 
Peak 151.817385 346.848871 153.386892 

$我希望得到的结果如下图所示。

A18   A19   A20 
esp1 213.164273 319.549715 198.585854 
esp2 153.412569 349.485482 145.959831 
esp3 125.797093 358.592932 124.882848 
esp4 198.156800 327.608988 185.250738 
esp5 148.445582 351.232905 141.896721 
esp6 151.817385 346.848871 153.386892 

Answer 1

df1.index = ['esp'+ str(i) for i in range(len(df1.index))]