如何在Keras中获取模型的可训练参数的数量? [英] How can I get the number of trainable parameters of a model in Keras?
问题描述
我正在通过Model
API实现的所有层中都设置trainable=False
,但是我想验证一下是否有效. model.count_params()
返回参数总数,但是除了查看model.summary()
的最后几行之外,有什么方法可以获取可训练参数的总数?
I am setting trainable=False
in all my layers, implemented through the Model
API, but I want to verify whether that is working. model.count_params()
returns the total number of parameters, but is there any way in which I can get the total number of trainable parameters, other than looking at the last few lines of model.summary()
?
推荐答案
from keras import backend as K
trainable_count = int(
np.sum([K.count_params(p) for p in set(model.trainable_weights)]))
non_trainable_count = int(
np.sum([K.count_params(p) for p in set(model.non_trainable_weights)]))
print('Total params: {:,}'.format(trainable_count + non_trainable_count))
print('Trainable params: {:,}'.format(trainable_count))
print('Non-trainable params: {:,}'.format(non_trainable_count))
以上代码段可以在 layer_utils.print_summary()
定义,其中 summary()
正在呼叫.
The above snippet can be discovered in the end of layer_utils.print_summary()
definition, which summary()
is calling.
more recent version of Keras has a helper function count_params()
for this purpose:
from keras.utils.layer_utils import count_params
trainable_count = count_params(model.trainable_weights)
non_trainable_count = count_params(model.non_trainable_weights)
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