instance

Possible Duplicate: “Least Astonishment” in Python: The Mutable Default Argument I have the following code: class Node(object): def __init__(self, value = 0, children = {}): self.val = value self.children = children def setChildValue(self, index, childValue): self.children[index] = Node(childValue) n = Node() n.setChildValue(0,10) print n.children n2 = Node() print n2.children And it prints: {0: <__main__.Node object at 0x10586de90>} {0: <__main__.Node object at 0x10586de90>} So my question is, why is children defined in n2? Children is an instance variable and yet it's acting like a class

I need to iterate over all Word instances, no matter if opened by users, by automation, zumbis, etc. I will describe all the steps until now: I saw and implemented the solutions that I got here ; Do For Each objWordDocument In objWordApplication.Documents OpenDocs(iContadorDocs - 1) = objWordDocument.Name OpenDocs(iContadorDocs) = objWordDocument.path iContadorDocs = iContadorDocs + 2 ReDim Preserve OpenDocs(iContadorDocs) Next objWordDocument iWordInstances = iWordInstances + 1 objWordApplication.Quit False Set objWordApplication = Nothing Set objWordApplication = GetObject(, "Word

is there any possibility to "invoke" a class instance by a string representation? In this case i would expect code to look like this: class MyClass { public $attribute; } $obj = getInstanceOf( "MyClass"); //$obj is now an instance of MyClass $obj->attribute = "Hello World"; I think this must be possible, as PHP's SoapClient accepts a list of classMappings which is used to map a WSDL element to a PHP Class. But how is the SoapClient "invoking" the class instances? $class = 'MyClass'; $instance = new $class; However, if your class' constructor accepts a variable number of arguments, and you hold

The answer to this question: What is the initial value of a JavaScript function's prototype property? has this sentence: The initial value of prototype on any newly-created Function instance is a new instance of Object As far as I know, Javascript doesn't have classes and the word 'instance' therefor doesn't make sense in my head. How should one interpret 'instance' in Javascript? Sorry, I don't have enough rep to put my question in the comment thread on that answer. You're right that JavaScript doesn't have classes (yet), but it does have constructor functions, an instanceof operator that

I am trying to list the instances on tag values of different tag keys For eg> one tag key - Environment, other tag key - Role. My code is given below : import argparse import boto3 AWS_ACCESS_KEY_ID = '<Access Key>' AWS_SECRET_ACCESS_KEY = '<Secret Key>' def get_ec2_instances(Env,Role): ec2 = boto3.client("ec2", region) reservations = ec2.describe_instances(Filters={"tag:environment" : Env, "tag:role" : Role}) for reservation in reservations["Reservations"] : for instance in reservation["Instances"]: print "%s" % (instance.tags['Name']) if __name__ == '__main__': regions = ['us-east-1','us

I have a string which contains a name of the Class (this is coming from a json file). This string tells my Template Class which layout / template to use for the data (also in json). The issue is my layout is not displaying. Home.jsx: //a template or layout. var Home = React.createClass({ render () { return ( <div>Home layout</div> ) } }); Template.jsx: var Template = React.createClass({ render: function() { var Tag = this.props.template; //this is the name of the class eg. 'Home' return ( <Tag /> ); } }); I don't get any errors but I also don't see the layout / Home Class. I've checked the