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
There is no generic way for a function to refer to itself. Consider using a decorator instead. If all you want as you indicated was to print information about the function that can be done easily with a decorator: from functools import wraps def showinfo(f): @wraps(f) def wrapper(*args, **kwds): print(f.__name__, f.__hash__) return f(*args, **kwds) return … 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
In order for that to work, you should define the C method like this: void cMethod(id param); and when you call it, call it like this: cMethod(self); then, you would be able to write: [param objcMethod]; In your cMethod. This is because the self variable is a special parameter passed to Objective-C methods automatically. Since … Read more
tl;dr You can fix this problem by making the Timed class a descriptor and returning a partially applied function from __get__ which applies the Test object as one of the arguments, like this class Timed(object): def __init__(self, f): self.func = f def __call__(self, *args, **kwargs): print(self) start = dt.datetime.now() ret = self.func(*args, **kwargs) time = … Read more
This is because attributes/associations are actually methods(getters/setters) and not local variables. When you state “parent = value” Ruby assumes you want to assign the value to the local variable parent. Somewhere up the stack there’s a setter method “def parent=” and to call that you must use “self.parent = ” to tell ruby that you … Read more
In addition to what others said (especially PeterSO and dskinner—in his comment to the Peter’s answer), note several important things: You can call a method like a simple function In Go, you can call any method function not as a method on a receiver but rather as a regular function—simply by qualifying its name with … Read more
When you write a class block, you create class attributes (or class variables). All the names you assign in the class block, including methods you define with def become class attributes. After a class instance is created, anything with a reference to the instance can create instance attributes on it. Inside methods, the “current” instance … Read more
In Python, this: my_object.method(“foo”) … is syntactic sugar, which the interpreter translates behind the scenes into: MyClass.method(my_object, “foo”) … which, as you can see, does indeed have two arguments – it’s just that the first one is implicit, from the point of view of the caller. This is because most methods do some work with … Read more