tensorflow 2. X multi classification confusion matrix and evaluation index calculation method (accuracy rate, recall rate, F1 score)

import tensorflow as tf


class MultiLabelConfusionMatrix(object):
    """ Attention Please: y_true and y_pred are must to be two-dimensional matrix, and their shape are [batch_size, time_steps]. """
    def __init__(self, classes_num, pad_type='pre')<