class

问题 I wrote a Python module, with several classes that inherit from a single class called MasterBlock . I want to import this module in a script, create several instances of these classes, and then get a list of all the existing instances of all the childrens of this MasterBlock class. I found some solutions with vars()['Blocks.MasterBlock'].__subclasses__() but as the instances I have are child of child of MasterBlock , it doesn't work. Here is some example code: Module: Class MasterBlock: def

问题 I have a portfolio webpage, where I need describtions and and "Image"-tag to show, when the projects are clicked. For this I am using toggle, javascript. I currently have this piece of code, where I want the span.class and the paragraph to both expand when the project is clicked. Otherwise I wish that both elements remain hidden on the page. Right now I cannot make span.class hide before toggle, and so only the paragraph show on toggle, which causes the whole thing to look wierd. This is the

问题 I have a portfolio webpage, where I need describtions and and "Image"-tag to show, when the projects are clicked. For this I am using toggle, javascript. I currently have this piece of code, where I want the span.class and the paragraph to both expand when the project is clicked. Otherwise I wish that both elements remain hidden on the page. Right now I cannot make span.class hide before toggle, and so only the paragraph show on toggle, which causes the whole thing to look wierd. This is the

问题 I have a portfolio webpage, where I need describtions and and "Image"-tag to show, when the projects are clicked. For this I am using toggle, javascript. I currently have this piece of code, where I want the span.class and the paragraph to both expand when the project is clicked. Otherwise I wish that both elements remain hidden on the page. Right now I cannot make span.class hide before toggle, and so only the paragraph show on toggle, which causes the whole thing to look wierd. This is the

问题 I'm new to OOP and I can't figure out why this isn't working. Is it not ok to instantiate a class with in a class. I've tried this with included file with in the method and it didn't make a change. include('Activate.php'); class First { function __construct() { $this->activate(); } private function activate() { $go = new Activate('Approved'); } } $run = new First(); 回答1: Are you saying that you want to access $go ? because, if that is the case, you need to change the scope of it. As you see,

问题 I'm new to OOP and I can't figure out why this isn't working. Is it not ok to instantiate a class with in a class. I've tried this with included file with in the method and it didn't make a change. include('Activate.php'); class First { function __construct() { $this->activate(); } private function activate() { $go = new Activate('Approved'); } } $run = new First(); 回答1: Are you saying that you want to access $go ? because, if that is the case, you need to change the scope of it. As you see,

问题 I have class X<T> : Base { //For exemple: static T something(); } And I can have class A : X <A> { } To logically have something like this: class A : Base { static A something(); } This works and works well. But in my comprehension, it's kind of self-reference (A is the children of X, while X doesn't exists before A...), which is breaks the foundation of computer science, so I want to know what's wrong with my comprehension?? 回答1: It's totally fine. You can do similar without generics too:

问题 I am using VS 2008 (C#)... I have created a function in a GlobalClass to use it globally.. This is for opening a dialog box. When I call this function in my method it works but I am not able to use the Object "OFD" that I have created here... static class GlobalClass { public static void OFDbutton() { OpenFileDialog ofd = new OpenFileDialog(); ofd.Filter = "Image files|*.jpg;*.jpeg;*.png;*.gif"; DialogResult dr = ofd.ShowDialog(); } } In the form method. I am using globalclass.ofdbutton(); /

问题 I am trying to create a single point within a polygon using a class for use in an agent based model. Currently I am able to create random points constrained to the bounds of the polygon, but not the polygon itself. My code at present appears to ignore the if statement within the while loop. I am very new to python so this could be a limitation I am missing. Here is my current code: import geopandas as gpd import matplotlib.pyplot as plt import random import pandas as pd bounds = gpd.read_file

问题 I am trying to create a single point within a polygon using a class for use in an agent based model. Currently I am able to create random points constrained to the bounds of the polygon, but not the polygon itself. My code at present appears to ignore the if statement within the while loop. I am very new to python so this could be a limitation I am missing. Here is my current code: import geopandas as gpd import matplotlib.pyplot as plt import random import pandas as pd bounds = gpd.read_file