serialization

问题 I have a Keras model where I'd like to add a constant to the predictions. After some googling, I've ended up with the following code, which does exactly what I want: import numpy as np from keras.layers import Input, Add from keras.backend import variable from keras.models import Model, load_model inputs = Input(shape=(1,)) add_in = Input(tensor=variable([[5]]), name='add') output = Add()([inputs, add_in]) model = Model([inputs, add_in], output) model.compile(loss='mse', optimizer='adam') X =

问题 I have a Keras model where I'd like to add a constant to the predictions. After some googling, I've ended up with the following code, which does exactly what I want: import numpy as np from keras.layers import Input, Add from keras.backend import variable from keras.models import Model, load_model inputs = Input(shape=(1,)) add_in = Input(tensor=variable([[5]]), name='add') output = Add()([inputs, add_in]) model = Model([inputs, add_in], output) model.compile(loss='mse', optimizer='adam') X =

问题 I'm having a hard time understanding what serialization is and does. Let me simplify my problem. I have a struct info in my c/c++ programs, and I may store this struct data into a file save.bin or send it via socket to another computer. struct info { std::string name; int age; }; void write_to_file() { info a = {"Steve", 10}; ofstream ofs("save.bin", ofstream::binary); ofs.write((char *) &a, sizeof(a)); // am I doing it right? ofs.close(); } void write_to_sock() { // I don't know about socket

问题 When you're writing a serializer, it is trivial to specify which fields will be included (via Meta 's fields ), setting read/write permissions on them and validating them. However, I was wondering if there is an easy way to specify that only the fields that are included are to be expected and any extra keys passed in should raise an error. E.g. say, I have a serializer class ModelASerializer(serializers.ModelSerializer): class Meta: model = models.ModelA fields = ('name', 'number') Supposed

问题 When you're writing a serializer, it is trivial to specify which fields will be included (via Meta 's fields ), setting read/write permissions on them and validating them. However, I was wondering if there is an easy way to specify that only the fields that are included are to be expected and any extra keys passed in should raise an error. E.g. say, I have a serializer class ModelASerializer(serializers.ModelSerializer): class Meta: model = models.ModelA fields = ('name', 'number') Supposed

问题 I want to change the packages of multiple classes in my application. A nice eclipse redactor good have been great but some of my classes are Serializables and I need to support cross version compatibility. Any Idea on how it can be done? Can it be done automatically/semi-automatically? 回答1: If the class structure remains the same, you can subclass a custom ObjectInputStream, call enableResolveObject(true) in its constructor and then override readClassDescriptor() with something like that:

问题 I'm currently creating a concept which uses Boost::Serialization and which needs to implement its own Boost::Archive cause the data has to be serialized in a certain way. There is documentation about implementing custom archives in the documentation: http://www.boost.org/doc/libs/1_44_0/libs/serialization/doc/index.html But I'm curious if there are any other (reallife) examples anywhere on the net. I couldn't find any. Perhaps someone could point me to a source or article. 回答1: Example

问题 I'm currently creating a concept which uses Boost::Serialization and which needs to implement its own Boost::Archive cause the data has to be serialized in a certain way. There is documentation about implementing custom archives in the documentation: http://www.boost.org/doc/libs/1_44_0/libs/serialization/doc/index.html But I'm curious if there are any other (reallife) examples anywhere on the net. I couldn't find any. Perhaps someone could point me to a source or article. 回答1: Example

问题 I'm trying to add a nested serializer to an existing serializer based on some criteria of the parent model, not a Foreign key. The use case is to return a 'Research' object with an array of 'ResearchTemplate' objects that are identified by filtering on a Postgres ArrayField. Models class Research(TimeStampedModel): category = models.CharField(max_length=100, choices=RESEARCH_TEMPLATE_CATEGORIES, default='quote') body = models.CharField(max_length=1000, blank=True, default='') #The body of

问题 i'm working on a network java code, and i can't seem to understand what are the prerequisites an ObjectInputStream needs to interpret bytes. Here is a part of the code : InputStream is = /* creation of the stream */ ObjectInputStream in = new ObjectInputStream(is); System.out.println(in.readInt()); // the exception is thrown here exception and stack trace : java.io.StreamCorruptedException: invalid type code: 77040000 at java.io.ObjectInputStream$BlockDataInputStream.readBlockHeader(Unknown