逻辑回归中的代码问题

Question

w_min = np.matrix(result[0])
predictions = predict(w_min, X)
correct = [
    1 if ((a == 1 and b == 1) or (a == 0 and b == 0)) else 0
    for (a, b) in zip(predictions, y)
]
accuracy = (sum(map(int, correct)) % len(correct))
print('accuracy = {0}%'.format(accuracy))

correct函数返回值是列表，为什么后面还要map函数转化为列表

Answer 1

第一行的result[0]的作用是什么