coef_和intercept_属性表示您的想法，因为您忘记了归一化，所以概率计算已关闭:

The coef_ and intercept_ attributes represent what you think, your probability calculations are off because you forgot to normalize: after

P = A / (1 + A)

你应该做

P /= P.sum(axis=1).reshape((-1, 1))

再现 scikit-learn算法.