self

问题 So clearly Im doing something wrong. Im a new python/noob coder so it may be obvious for many of you but Im not sure what to do. class hero(): """Lets do some heros shit""" def __init__(self, name="Jimmy", prof="Warrior", weapon="Sword"): """Constructor for hero""" self.name = name self.prof = prof self.weapon = weapon self.herodict = { "Name": self.name, "Class": self.prof, "Weapon": self.weapon } self.herotext = { "Welcome": "Greetings, hero. What is thine name? ", "AskClass": "A fine name

问题 I would like to cite between methods inside this subclass "ImDisp", whose father class is "mywindow". But I found in "Bs" method, the 'BsInf' cannot be cited. Why? class ImDisp(mywindow): def __init__(self): super(ImDisp,self).__init__() def BsFig(self): print('BsFig') def BsInf(self): print('BsInf') def Bs(self): self.BsInf #This doesn't work, why? print('Bs') 回答1: You should call the method by adding parentheses to the function object: self.BsInf() 来源： https://stackoverflow.com/questions

问题 I've created WCF self hosting service in local machine and silverlight App gets data from this service and send it to remote server. It worked well for more than a month but suddenly stopped complaining well known errors clientaccesspolicy.xml not resolved. After spending quite some time to debug, I realized it failed since the remote server address has been changed into IP address instead of domain addresss, for example http://2xx.1xx.223 iso http://www.myserver.com, but domain address is

问题 In XCode 6.2, I have a Swift project where a main-object ("Backbone") creates sub-objects with pointers back to Backbone: class Backbone { let logManager: QCLogManager! let cloudJobManager: CloudJobManager! ... init() { logManager = QCLogManager(backbone: self) cloudJobManager = CloudJobManager(backbone: self) ... } It works very nicely. However, in XCode 6.3 each line in init() now gives the error: 'self' used before all stored properties are initialized. That seems a rather unhelpful

问题 I just realise that, for some weird circumstances, I was doing what I believe to be self submissions, without any reference to PHP_SELF on the action form attribute. I'm puzzled, can we either use <?php echo filter_var($_SERVER['PHP_SELF'], FILTER_SANITIZE_STRING); ?> Or action="" ? If not, on what circumstances should we considered one, or another? Thanks in advance, MEM 回答1: You can use either (PHP_SELF or empty string). but why would you use FILTER_SANITIZE_STRING for this? You'd better to

问题 I have a small Python program that should react to pushing the up button by running an appropriate method. But instead of doing this, it gives me a confusing error... from tkinter import * class App: def __init__(self, master): self.left = 0 self.right = 0 widget = Label(master, text='Hello bind world') widget.config(bg='red') widget.config(height=5, width=20) widget.pack(expand=YES, fill=BOTH) widget.bind('<Up>',self.incSpeed) widget.focus() def incSpeed(self): print("Test") root = Tk() app

问题 I'm doing the code academy stream and I have a little experience in Ruby. I don't understand why the check_angles(self) function needs the self parameter. The reason I'm confused is that I don't understand what is passing the self parameter to the function when it is called. it seems like the function call (the last line of the code block) is passing self implicitly, but the function requires self explicitly defined as a parameter. Why is this? class Triangle(object): def __init__(self,

问题 From what I read/understand, the 'self' parameter is similiar to 'this'. Is that true? If its optional, what would you do if self wasnt' passed into the method? 回答1: Yes, it's used in similar ways. Note that it's a positional parameter and you can call it what you want; however there is a strong convention to call it self (not this or anything else). Some positional parameter must be there for a usable instance method; it is not optional. 回答2: The joy of Python That is true to some extend.

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 4 years ago . I don't understand what these are used for, particularly the self argument? Could some please explain this to me and why on earth you would want to pass this in? Also, I've always thought __init__ was for 'initialisation', but it didn't occur to me that I've never had to put

问题 Why is the 'self'-call to a non-satic method in this example working? class A{ protected function aNonStaticMethod(){ return __class__; } public function aEcho(){ echo self::aNonStaticMethod(); } } Thanks for explanation. 回答1: Calling non-static method statically Theoretically it should not work, but as this comment says: There was no static keyword in php4 but php4 did allow for static calls. To maintain backwards compatibility this was left in when the static keyword was added in php5. This