Python：从索引行获取值并将它们附加到数组

Question

你能帮我弄清楚这个简单的编码问题吗？ 我试图得到索引线的'VIS'值。索引值预先作为'index'数组引入。

提前谢谢。

VIS = []
index = [20,25] # line indexes to read

def read_Visibility():
   for i,file in enumerate(glob.glob(Path + '/*.txt')):
       with open(file,encoding = 'latin-1') as f:
           # go to index of (i + 52) and get the line
           Vis_line  = f.readlines()[index[i]+52] 
           # get the value of visibility if it is digit
           value = [int(value) for value in str.split(Vis_line) if value.isdigit()]

           return VIS.append(value)

VIS = read_Visibility()
print(VIS)

结果是：

  

无