First off, a subroutine isn’t passed the @ARGV array. Rather all the parameters passed to a subroutine are flattened into a single list represented by @_ inside the subroutine. The @ARGV array is available at the top-level of your script, containing the command line arguments passed to you script. Now, in Perl, when you call … Read more
One way to keep track of instances is with a class variable: class A(object): instances = [] def __init__(self, foo): self.foo = foo A.instances.append(self) At the end of the program, you can create your dict like this: foo_vars = {id(instance): instance.foo for instance in A.instances} There is only one list: >>> a = A(1) >>> … Read more
Just specify explicitly what is the type of pictures: So instead of: let pictures = selectedRestaurant[“Pictures”] as! NSArray Write: let pictures: NSArray = selectedRestaurant[“Pictures”] as! NSArray
This can be done by using an APIRouter‘s add_api_route method: from fastapi import FastAPI, APIRouter class Hello: def __init__(self, name: str): self.name = name self.router = APIRouter() self.router.add_api_route(“/hello”, self.hello, methods=[“GET”]) def hello(self): return {“Hello”: self.name} app = FastAPI() hello = Hello(“World”) app.include_router(hello.router) Example: $ curl 127.0.0.1:5000/hello {“Hello”:”World”} add_api_route‘s second argument (endpoint) has type Callable[…, Any], … Read more
Other replies have pointed out that self is not going to refer to the FORM and that self is window. They’re right; self is window. Well, except when it isn’t. In either IE6 or IE7 (forgot), self.onload would not fire, though window.onload would. All official versions of IE (and even IE9pr3) have an odd, intransitive … Read more
self.__class__ is a reference to the type of the current instance. For instances of abstract1, that’d be the abstract1 class itself, which is what you don’t want with an abstract class. Abstract classes are only meant to be subclassed, not to create instances directly: >>> abstract1() Traceback (most recent call last): File “<stdin>”, line 1, … Read more
Adding an answer because Oskarbi’s isn’t explicit. You use self when: Defining an instance method. It is passed automatically as the first parameter when you call a method on an instance, and it is the instance on which the method was called. Referencing a class or instance attribute from inside an instance method. Use it … Read more
When you call a method on a class (such as generatecode() in this case), Python automatically passes self as the first argument to the function. So when you call self.my_func(), it’s more like calling MyClass.my_func(self). So when Python tells you “generatecode() takes 0 positional arguments but 1 was given”, it’s telling you that your method … Read more
It is idiomatic to prefer to omit self. when invoking methods; it is generally never needed. You must use self.foo = xxx when calling a setter method, instead of foo = xxx, so that Ruby realizes that you are not trying create a new local variable. Similarly, in the unlikely event that you have an … Read more