【实用技巧】

python列表展平

s = [1, [2, [3, [4, [5, 6], 7], 8], (9, 0)]]
f = lambda x: [y for _x in x for y in f(_x)] if isinstance(x, (list, tuple)) else [x]print(f(s))  # [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]

numpy数组转一维

data.flatten()
data.reshape()