刚刚解决了这个问题,现在记录下来
问题描述
当使用lambda层加入自定义的函数后,训练没有bug,载入保存模型则显示Nonetype has no attribute 'get'
问题解决方法:
这个问题是由于缺少config信息导致的。lambda层在载入的时候需要一个函数,当使用自定义函数时,模型无法找到这个函数,也就构建不了。
m = load_model(path,custom_objects={"reduce_mean":self.reduce_mean,"slice":self.slice})
其中,reduce_mean 和slice定义如下
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def slice ( self ,x, turn):
""" Define a tensor slice function
"""
return x[:, turn, :, :]
def reduce_mean( self , X):
return K.mean(X, axis = - 1 )
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补充知识:含有Lambda自定义层keras模型,保存遇到的问题及解决方案
一,许多应用,keras含有的层已经不能满足要求,需要透过Lambda自定义层来实现一些layer,这个情况下,只能保存模型的权重,无法使用model.save来保存模型。
保存时会报
TypeError: can't pickle _thread.RLock objects
二,解决方案,为了便于后续的部署,可以转成tensorflow的PB进行部署。
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from keras.models import load_model
import tensorflow as tf
import os, sys
from keras import backend as K
from tensorflow.python.framework import graph_util, graph_io
def h5_to_pb(h5_weight_path, output_dir, out_prefix = "output_" , log_tensorboard = True ):
if not os.path.exists(output_dir):
os.mkdir(output_dir)
h5_model = build_model()
h5_model.load_weights(h5_weight_path)
out_nodes = []
for i in range ( len (h5_model.outputs)):
out_nodes.append(out_prefix + str (i + 1 ))
tf.identity(h5_model.output[i], out_prefix + str (i + 1 ))
model_name = os.path.splitext(os.path.split(h5_weight_path)[ - 1 ])[ 0 ] + '.pb'
sess = K.get_session()
init_graph = sess.graph.as_graph_def()
main_graph = graph_util.convert_variables_to_constants(sess, init_graph, out_nodes)
graph_io.write_graph(main_graph, output_dir, name = model_name, as_text = False )
if log_tensorboard:
from tensorflow.python.tools import import_pb_to_tensorboard
import_pb_to_tensorboard.import_to_tensorboard(os.path.join(output_dir, model_name), output_dir)
def build_model():
inputs = Input (shape = ( 784 ,), name = 'input_img' )
x = Dense( 64 , activation = 'relu' )(inputs)
x = Dense( 64 , activation = 'relu' )(x)
y = Dense( 10 , activation = 'softmax' )(x)
h5_model = Model(inputs = inputs, outputs = y)
return h5_model
if __name__ = = '__main__' :
if len (sys.argv) = = 3 :
# usage: python3 h5_to_pb.py h5_weight_path output_dir
h5_to_pb(h5_weight_path = sys.argv[ 1 ], output_dir = sys.argv[ 2 ])
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以上这篇解决Keras 中加入lambda层无法正常载入模型问题就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/weixin_39673686/article/details/90697587