methods

问题 So, basically my code is printing None after printing the statement I want it to print. How can I stop this None from printing class Panda: def __init__(self,name,gender,age): self.name=name self.gender=gender self.age=age def sleep(self,time=None): self.time=time if self.time!=None: if self.time>=3 and self.time<=5: self.food='Mixed Veggies' if self.time>=6 and self.time<=8: self.food='Eggplant & Tofu' if self.time>=9 and self.time<=11: self.food='Broccoli Chicken' print('{} sleeps {} hours

问题 So, basically my code is printing None after printing the statement I want it to print. How can I stop this None from printing class Panda: def __init__(self,name,gender,age): self.name=name self.gender=gender self.age=age def sleep(self,time=None): self.time=time if self.time!=None: if self.time>=3 and self.time<=5: self.food='Mixed Veggies' if self.time>=6 and self.time<=8: self.food='Eggplant & Tofu' if self.time>=9 and self.time<=11: self.food='Broccoli Chicken' print('{} sleeps {} hours

问题 My understanding is that a subclass behaves exactly like the parent class except for the additional methods or those that get "rewritten" with the new and override keywords. Apparently, that's not correct. Please see the code below (brackets removed for readability) class BIG protected void Output(string text = "") Console.WriteLine("BIG - " + text); public void CallingOutput() Output("Outputting..."); class SMALL:BIG public new void Output(string text = "") Console.WriteLine("SMALL - " +

问题 I am coming from Java background and currently learning C#. I just had a big surprise regarding (what I perceive as ) a difference in a way that an object accesses methods from base/derived class. Here is what I mean: In Java if I do something like this class InheritanceTesting { public void InheritanceOne() { System.out.println("InheritanceOne"); } } class NewInherit extends InheritanceTesting { public void InheritanceOne() { System.out.println("InheritanceTwo"); } } then run the following:

问题 My question is simple. How can I call a WinAPI Method like emptyClipboard in an UWP app? I included the 'Windows Desktop Extensions for the UWP' The method is listed under Windows API Index / Data Exchange / Clipboard Reference / Clipboard Functions I've tried the following ( js ): Windows.emptyClipboard(); Windows.WinAPI.emptyClipboard(); Windows.ApplicationModel.emptyClipboard(); Windows.DataExchange.emptyClipboard(); Windows.DataExchange.Clipboard.emptyClipboard(); each of them giving me

问题 I've been using some well documented code to programatically create Woocommerce orders. Working great. Reference here: https://quadlayers.com/add-products-woocommerce/ However I'd be keen to know if it's possible to define the order_id (or is that the post_id?) whilst creating my WC orders via a script. I run this code on my shop, which currently imports orders into Woocommerce from a marketplace online where orders already have an Order number and I'd be keen to cut out the cross-referencing

问题 I've been using some well documented code to programatically create Woocommerce orders. Working great. Reference here: https://quadlayers.com/add-products-woocommerce/ However I'd be keen to know if it's possible to define the order_id (or is that the post_id?) whilst creating my WC orders via a script. I run this code on my shop, which currently imports orders into Woocommerce from a marketplace online where orders already have an Order number and I'd be keen to cut out the cross-referencing

问题 I'm asking about a variation of a (popular) question - detecting the existence of a method of a class. I've read many answers here in SO, and most of the (post C++17) solutions look like this: #include <type_traits> template<class ...Ts> struct voider{ using type = void; }; template<class T, class = void> struct has_foo : std::false_type{}; template<class T> struct has_foo<T, typename voider<decltype(std::declval<T>().foo())>::type> : std::true_type{}; Basically, we're letting the compiler

问题 Someone asked me what the difference between the two method parameters and why you would use the ... over specifically assigned array. putMessage(byte ...send) putMessage(byte[] send) I couldn't answer them with confidence and couldn't remember what the ... is called. 回答1: The first one is with Varargs. In short A. First can be used to call with single byte type arg, 2 byte args.. or many args or an array. B. second will be used with array only. 回答2: The ... in your first example are called

问题 This question already has answers here : Python interpreter error, x takes no arguments (1 given) (4 answers) “<method> takes no arguments (1 given)” but I gave none (3 answers) Python:Function takes no arguments (2 answers) Closed 3 years ago . class MyClass: def say(): print("hello") mc = MyClass() mc.say() I am getting error: TypeError: say() takes no arguments (1 given) . What I am doing wrong? 回答1: This is because methods in a class expect the first argument to be self . This self