运行下列脚本，可以打印出模型各个节点变量的名称：
from tensorflow.python import pywrap_tensorflow
import os
checkpoint_path=os.path.join('model.ckpt-131805')
reader=pywrap_tensorflow.NewCheckpointReader(checkpoint_path)
var_to_shape_map=reader.get_variable_to_shape_map()
for key in var_to_shape_map:
print 'tensor_name: ',key
checkpoint_path为自己的模型路径