如何在Keras生成器中引用纪元号？

Question

我正在构建一个由Keras fit_generator函数使用的Python生成器。我想使用生成器中的当前纪元计数来调整值。有没有办法引用这个数字？

def generate_arrays_from_file(path):
    while 1:
    f = open(path)
    for line in f:
        x, y = process_line(line)
        epoch_number = ?
        x = x + epoch_number
        yield (x, y)
    f.close()

model.fit_generator(generate_arrays_from_file('/my_file.txt'),
        samples_per_epoch=10000, nb_epoch=10)

Answer 1

怎么样：

def generate_arrays_from_file(path, samples_per_epoch):
    samples_produced_in_current_epoch = 0
    epoch_number = 1
    while 1:
    f = open(path)
    for line in f:
        x, y = process_line(line)
        x = x + epoch_number
        samples_produced += x.shape[0]
        if samples_produced_in_current_epoch > samples_per_epoch:
            epoch_number += 1
            samples_produced_in_current_epoch = 0      
        yield (x, y)

    f.close()