class

问题 I have a variable f. How can I determine its type? Here is my code, typed into a python interpreter, showing that I get an error using the successful pattern of the many examples I have found with Google. (Hint: I am very new to Python.) >>> i=2; type(i) is int True >>> def f(): ... pass ... >>> type(f) <class 'function'> >>> type(i) <class 'int'> >>> type(f) is function Traceback (most recent call last): File "<stdin>", line 1, in <module> NameError: name 'function' is not defined >>> f=3 >>

问题 Well I'm teaching myself about python classes and when I run my code I get the following error: class Critter(object): """A virtual pet""" def _init_(self, name, mood): print("A new critter has been born!!!!!") self.name = name self.__mood = mood def talk(self): print("\n Im",self.name) print("Right now I feel",self._mood) def _private_method(self): print("this is a private method") def public(self): print("This is a public method. ") self._private_method( ) crit = Critter(name = "Poochie",

问题 I have this code here in PHP using Codeigniter framework, I can't seem to get my head around class variables in this code seems completely different to C++. I was wondering how I can get a local variable in one class (function) method to another class method. But not passing them as variables as I have to use a redirect function instead which cannot take variables. The variable I want to have accessible is $record_id , i tried making it public etc does not like it. class Submit extends CI

问题 I wrote a small class that creates a report object containing 3 arrays. At creation of the object these arrays are initialised with values. However when i test the class to see for example what's in the departments array, it prints out that the array elements are null. why? class Report { // declare instance variables (arrays) public String[] departments = new String[4] ; public double[] grossTotals = new double[4] ; public double[] taxTotals = new double[4] ; // constructor public Report(){

问题 I have a code below, i want to modify class's variables in static function but there is some error. How can i fix it with "this" pointer? There is no access to "this" pointer for static members in class,on the other hand I am trying to make an access to class variables in Static member function, therefore i am looking for a way to use "this" pointer of class "me" to do it. class me { public: void X() { x = 1;} void Y() { y = 2;} static void Z() { x = 5 ; y = 10; } public: int x, y; }; int

问题 Ok, one TypeError more. Here is my code: class musssein: def notwendig(self, name): self.name = name all = [] # fuer jede Eigenschaft eine extra Liste day = [] time = [] prize = [] what = [] kategorie = [] with open(name) as f: for line in f: data = line.replace('\n','') #Umbruchzeichen ersetzen if data != ' ': # immer nur bis zur neuen Zeile bzw. bis zum ' ' lesen all.append(data) # in liste einfuegen else: kategorie.append(all.pop()) what.append(all.pop()) prize.append(all.pop()) time

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 5 years ago . I'm referring to MDN's article on JavaScript's 'future reserved words' (for use in the new strict mode) - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Lexical_grammar#Future_reserved_keywords . All the reserved words indicate that JavaScript will possibly

问题 Static members confuse me sometimes. I understand how to initialize a simple built in type such as int with something along the lines of int myClass::statVar = 10; , which you place in a .cpp file, but I have something of the following sort: class myClass { public: // Some methods... protected: static RandomGenerator itsGenerator; } The basic idea is simple enough: myClass needs access to a random generator for one of its member functions. I also can have only a few instances of the generator

问题 I am working on a website in which I want to check whether element has any content in it. Below is my html code. I have mentioned condition#1 where opacity-pointseven class should be added through script if classes featured-block__title and featured-block__tag have content in it. <div class="featured-block"> <a href="/" class="featured-block__item cf"> <div class="featured-block__item-inner"> <figure class="featured-block__image img-fit"> <img src=""> // (condition#1, where opacity-pointseven

问题 Okay so I did search this question and a decent amount of results showed up. All of them seemed to have pretty different scenarios though and the solutions were different for each one so I'm a bit confused. Basically, I have a Driver class that runs my program and contains the main method. I have a second class that has a few methods for editing a party (like party of characters in a game). What I wanted to do was this (part of main method) System.out.println("Are you <ready> for your next