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return self[key] def __setattr__(self, key, value): self[key] = value. To instantiate the object attributes using a dictionary: setattr(obj, k, v) great answer, the only thing I changed was to use Struct as the name of the class to make it more obvious. Saved me a ton of typing [" and "], Cheers!
type('', (), {})() will create an object that can have arbitrary attributes. Example: type() with three arguments creates a new type. The first argument '' is the name of the new type. We don't care about the name, so we leave it empty. The second argument () is a tuple of base types. Here object is implicit.
Using dir does not work because it includes class attributes, such as methods or properties, as well as the object attributes. Using vars is equivalent to using __dict__ . This is the best I have:
Alternatively, depending on what you want to do, it might be nice to inherit from dict. Then your class is already a dictionary, and if you want you can override getattr and/or setattr to call through and set the dict. For example: class Foo(dict): def __init__(self): pass. def __getattr__(self, attr):
4. Objects in python store their atributes (including functions) in a dict called __dict__. You can (but generally shouldn't) use this to access the attributes directly. If you just want a list, you can also call dir(obj), which returns an iterable with all the attribute names, which you could then pass to getattr.
In Javascript it would be: var newObject = { 'propertyName' : 'propertyValue' }; newObject.propertyName; // returns "propertyValue" But the same syntax in Python would create a dictionary, and t...
With this in mind, we made two key changes. 1) We made attributes lazy-loaded 2) instead of creating copies of a dictionary object, we create copies of a light-weight proxy object. This is the final implementation. The performance increase of using this code is incredible.
It's an object that provides custom handling for a given attribute, on a given class. Kinda like a way to factor a huge if tree out of __getattribute__. When I ask for foo.b in the example above, Python sees that the b defined on the class implements the descriptor protocol—which just means it's an object with a __get__, __set__, or ...
student1=Student() Actually this init method is the constructor of class.you can initialize that method using some attributes.. In that point , when you creating an object , you will have to pass some values for particular attributes.. class Student: def __init__(self,name,age): self.name=value. self.age=value.
However, you should note that you can't do that to a "pure" instance of object. But it is likely you have a simple subclass of object where it will work fine. I would strongly urge the O.P. to never make instances of object like that.