python dataframe实现统计行列中零值的个数

(df == 0).astype(int).sum(axis=1)

lst = [2,4,-7,19,-2,-1,45]
lst_1 = [i for i in lst if i <0]
print(lst_1)

lst = [2,4,-7,19,-2,-1,45]
def is_zero(x):
    if x <0:
        return x
print(list(filter(is_zero,lst)))