class

问题 I trying to learn OOP and I've made this class class boo{ function boo(&another_class, $some_normal_variable){ $some_normal_variable = $another_class->do_something(); } function do_stuff(){ // how can I access '$another_class' and '$some_normal_variable' here? return $another_class->get($some_normal_variable); } } and I call this somewhere inside the another_class class like $bla = new boo($bla, $foo); echo $bla->do_stuff(); But I don't know how to access $bla, $foo inside the do_stuff

问题 I would like to make a copy of a class instance in python. I tried copy.deepcopy but I get the error message: RuntimeError: Only Variables created explicitly by the user (graph leaves) support the deepcopy protocol at the moment So suppose I have something like: class C(object): def __init__(self,a,b, **kwargs): self.a=a self.b=b for x, v in kwargs.items(): setattr(self, x, v) c = C(4,5,'r'=2) c.a = 11 del c.b And now I want to make an identical deep copy of c , is there an easy way? 回答1: Yes

问题 I would like to make a copy of a class instance in python. I tried copy.deepcopy but I get the error message: RuntimeError: Only Variables created explicitly by the user (graph leaves) support the deepcopy protocol at the moment So suppose I have something like: class C(object): def __init__(self,a,b, **kwargs): self.a=a self.b=b for x, v in kwargs.items(): setattr(self, x, v) c = C(4,5,'r'=2) c.a = 11 del c.b And now I want to make an identical deep copy of c , is there an easy way? 回答1: Yes

问题 I'm working on my first Python project, and I'm already missing events in my classes. Perhaps it's not even called events in Python, but I would like to create "groups" in my classes to which function references can be added. At some point in my class all function references in my group would execute. Is this built into Python? (I'm using 2.7 at the moment) 回答1: Python doesn't have any sort of event system built-in, but it's could be implemented pretty simply. For example: class

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 20 hours ago . Improve this question Been programming for a while(C#). However, as I have been getting more in depth concerning the Stack and Heap, the concept of instances of a class type(user-defined and/or predefined) and a struct type(user-defined and/or predefined) still confuses me. This

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 20 hours ago . Improve this question Been programming for a while(C#). However, as I have been getting more in depth concerning the Stack and Heap, the concept of instances of a class type(user-defined and/or predefined) and a struct type(user-defined and/or predefined) still confuses me. This

问题 A newbie, I am trying to increase familiarity with OOP, building a class structure to allow for a more organized way of coding. I have several files in my structure, formulas.py , df.py and main.py , and a test.py file. Basically, I am therefore targeting elimination of test.py and df.py. Also, in class Data_Load , I have get_EDA_shape, get_EDA_describe and get_EDA_info . These are also redundant, and should be replaced by the functionality presented in def common_stats() . Now I want to

问题 I have the following class, UNetwork . It is there for reference. The actual question is related to the second class, Model . class UNetwork(object): nodes = dict() def _init_(self, nodes): self.nodes = nodes Now, the class ( Model ) has the following attributes: network — an instance of class UNetwork taken at instantiation; susceptible_nodes — a list of ids for nodes that are not yet infected; initially includes all nodes from network; infected_nodes — a list of ids for nodes that are

问题 Remy posted a great solution to pass any function with any number of arguments to std::thread , here. I was wondering how it could be used for class member functions. #include <iostream> #include <thread> #include <mutex> #define __PRETTY_FUNCTION__ __FUNCSIG__ std::mutex my_mutex; template<class Function, class... Args> void runFunctionInThread(Function f, Args&&... args) { // Beside starting a thread, this function performs other // task using the function and its arguments. std::thread t(f

问题 I am trying to write a server class with a method that takes a function as an argument and pass in a value (generated inside the server class) to the function for being run inside a thread. The following is just an example to illustrate what I am trying to do. My goal is to have the Server::runFunctionInThread general enough that works for methods of different classes as well as for functions that do not belong to any classes. Is this a possible thing to do? #include <iostream> #include