instance

来源： https://stackoverflow.com/questions/63004183/how-do-you-make-a-two-way-binding-within-a-class

问题 not have enough resources available to fulfill the request try a different zone All of my machines in the different zone have the same issue and can not run. "Starting VM instance "home-1" failed. Error: The zone 'projects/extreme-pixel-208800/zones/us-west1-b' does not have enough resources available to fulfill the request. Try a different zone, or try again later." 回答1: I am having the same issue. I emailed google and figured out this has nothing to do with quota. However, you can try to

问题 I want to return a class instance in member function of a class, my code is: class MyClass(object): def __init__(self, *args, **kwargs): [snippet] def func(self, *args, **kwargs): [snippet] return class_instnace_of_MyClass if __name__ == '__main__': obj = MyClass(...) newobj = obj.func(...) # type(newobj) is MyClass I think I can call __init__() in func() , and return a new instance of MyClass, but I don't think it is a Pythonic way to do so. How should I do that? Thank you! 回答1: I feel like

问题 I want to return a class instance in member function of a class, my code is: class MyClass(object): def __init__(self, *args, **kwargs): [snippet] def func(self, *args, **kwargs): [snippet] return class_instnace_of_MyClass if __name__ == '__main__': obj = MyClass(...) newobj = obj.func(...) # type(newobj) is MyClass I think I can call __init__() in func() , and return a new instance of MyClass, but I don't think it is a Pythonic way to do so. How should I do that? Thank you! 回答1: I feel like

问题 I have written a python-boto3 script to get all aws instances list from an account and region. the script is running fine, but not giving all instances. for example ,if n instances are with same Reservation number then getting only one instance under Reservation. please look at the below script , please help me how can I get all aws instances list irrespective of reservation number. rg = 'us-west-2' config = Config( retries = dict( max_attempts = 100 ) ) ec = boto3.client('ec2', config=config

问题 I have written a python-boto3 script to get all aws instances list from an account and region. the script is running fine, but not giving all instances. for example ,if n instances are with same Reservation number then getting only one instance under Reservation. please look at the below script , please help me how can I get all aws instances list irrespective of reservation number. rg = 'us-west-2' config = Config( retries = dict( max_attempts = 100 ) ) ec = boto3.client('ec2', config=config

问题 I am writing a class where I need to check whether the instance variables are of a certain type. I noticed that there is a lot of repeating code. Is there a better way to do similar checks on the instance variables? Or is this the right way to do it? class Variable(): __type = 'Variable' def __init__(self, id = None, updateable = True, name = 'Variable', value=None): if id is not None: self.id = id if value is not None: self.value = value self.updateable = updateable self.name = name

问题 I am writing a class where I need to check whether the instance variables are of a certain type. I noticed that there is a lot of repeating code. Is there a better way to do similar checks on the instance variables? Or is this the right way to do it? class Variable(): __type = 'Variable' def __init__(self, id = None, updateable = True, name = 'Variable', value=None): if id is not None: self.id = id if value is not None: self.value = value self.updateable = updateable self.name = name

问题 In iOS 13 Programming Fundamentals with Swift by Matt Neuburg I came across this strange bit of code class MyClass { var s = "" func store(_ s:String) { self.s = s } } class ViewController: UIViewController { override func viewDidLoad() { let m = MyClass() let f = MyClass.store(m) // what just happened!? f("howdy") print(m.s) // howdy } } Apparently f has the type () -> () (thats what it says on debugger at least) and yet on the next line we are passing a string to it. Based of the result it

问题 With this code: World w = new World(); var data = GetData<World>(w); If I get w with reflection and this can be of type World , Ambient , Domention , etc. How can I get GetData ??? I only have the instance object: var data = GetData<???>(w); 回答1: var type = <The type where GetData method is defined>; var genericType = typeof(w); var methodInfo = type.GetMethod("GetData"); var genericMethodInfo = methodInfo.MakeGenericMethod(genericType); //instance or null : if the class where GetData is