2个列表的布尔运算

Question

我想在两个列表中得到OR的结果，例如

a = [0,0,1,1]
b = [0,1,0,1]
output = [0,1,1,1]

我尝试过output = a or b，但答案不正确

Answer 1

您可以将a和b映射到operator.or_：

from operator import or_
output = map(or_, a, b)

output变为：

[0, 1, 1, 1]

Answer 2

output = map(lambda x, y: bool(x or y), a, b)

结果：

output == [False, True, True, True]

Answer 3

请注意，此处可以使用or或二进制运算符|：

a = [0,0,1,1]
b = [0,1,0,1]

a_or_b = [aa | bb for aa, bb in zip(a, b)]
# this also works:
# a_or_b = [aa or bb for aa, bb in zip(a, b)]
print(a_or_b)  # [0, 1, 1, 1]

Answer 4

您可以使用'numpy'库并在相应轴上获取最大值：

import numpy as np

a = np.array([[0,0,1,1], [0,1,0,1]])
np.amax(a, axis=0)