从列表中删除值

Question

我得到了一个如下所示的多个数据框：

A = [0,0,0,1,0,-1,2,-3,0,4,-4]

B = [0,0,0,1,-5,0,5,-6,0,4,-3,5,-6]

我想返回一个返回值，其中dataFrame的第一个条目是-ve值，最后一个数据是+ ve值。

输出

A = [-1,2,-3,4]

B = [-5,5,-6,4,-3,5]

如何运行循环以查看所有数据框？数据帧的长度不同。

Answer 1

代码：a = [0,0,0,1,0,-1,2,-3,0,4,-4]b = [0,0,0,1,-5,0,5,-6,0,4,-3,5,-6]def arr(x):&nbsp; &nbsp; x[:] = (value for value in x if value != 0)&nbsp; &nbsp; while x[0] > 0:&nbsp; &nbsp; &nbsp; &nbsp; x.pop(0)&nbsp; &nbsp; while x[-1] < 0:&nbsp; &nbsp; &nbsp; &nbsp; x.pop()&nbsp; &nbsp; # print(x)&nbsp; &nbsp; return xprint(arr(a))print(arr(b))输出：[-1, 2, -3, 4][-5, 5, -6, 4, -3, 5]您也可以使用x.pop(0)代替del x[0]