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What's the easiest way to create a naked object that I can assign attributes to?

The specific use case is: I'm doing various operations on a Django object instance, but sometimes the instance is None (there is on instance). In this case I'd like to create the simplest possible fake object such that I can assign values to its attributes (eg. myobject.foo = 'bar').

Basically I'm looking for the Python equivalent of this piece of Javascript:

myobject = {}
myobject.foo = 'bar'

I know I can use a mock object/library for this, but I'm hoping for a very simple solution (as simple as the Javascript above). Is there a way to create a naked object instance? Something like:

myobject = object()
myobject.foo = 'bar'

You need to create a simple class first:

class Foo(object):
    pass

myobject = Foo()
myobject.foo = 'bar'

You can make it a one-liner like this:

myobject = type("Foo", (object,), {})()
myobject.foo = 'bar'

The call to type functions identically to the previous class statement.

If you want to be really minimal...

myobject = type("", (), {})()

The key is that the built-in types (such as list and object) don't support user-defined attributes, so you need to create a type using either a class statement or a call to the 3-parameter version of type.

The Naked Objects framework, The code must follow a few simple conventions, but in general the business objects are coded in the same way that behaviourally-complete business objects​  Python simple naked objects. Ask Question Asked 7 years, 7 months ago. Active 1 year, 6 months ago. Viewed 11k times 27. 2. What's the easiest way to create a naked

If you're using Python >= 3.3 you could always use SimpleNamespace; which is included in the Python types module.

SimpleNamespace is great because you also get a repr and equivalency testing for free; both of which might come in handy even for a minimalist object.

Translating the JavaScript in the OP’s question would look like:

from types import SimpleNamespace

myobject = SimpleNamespace() # myobject = {}
myobject.foo = 'bar'

You can also use keyword arguments when instantiating SimpleNamespace. These arguments will become attributes on the instantiated SimpleNamespace:

p = SimpleNamespace(name='gary')
p.age = 32
p # => namespace(age=32, name='gary')

So a quick and easy way to turn a dictionary into a SimpleNamespace object —provided the dictionary keys are proper identifiers— is as simple as:

d = {
    'name': 'gary',
    'age': 33 # had a birthday. 
}
p = SimpleNamespace(**d)

Python >= 3.7 has dataclasses which are basically "mutable named tuples". This could be something you may want to use if you have a lot of data objects.

Naked Objects, In the naked objects approach writing a business application implies similar with scaffolding, and the Django framework in Python does the same. If this could be made this really easy, and yet really customisable,  A Python Command Line Application Framework ¶ Naked (source: PyPI, GitHub) is a MIT licensed command line application framework that provides a variety of features for Python application developers.

Use the Bunch module:

sudo pip install bunch

A bunch is a dictionary that allows to access its content via the dict.key syntax.

And then like that:

from bunch import Bunch
b = Bunch()
b.foo = "Bar"


b["foo2"] = "Bar2"
print b
>> Bunch(foo='Bar', foo2='Bar2')
b["foo"] = "Baz"
print b
>> Bunch(foo='Baz', foo2='Bar2')

chrissimpkins/naked: A Python command line application , Contribute to chrissimpkins/naked development by creating an account on GitHub. (2) a Python library with an easy to use command line string object parser  variable - Python simple naked objects python program to check if a date is valid (8) What's the easiest way to create a naked object that I can assign attributes to? The specific use case is: I'm doing various operations on a Django object instance, but sometimes the instance is None (there is on instance).

I'm coming here very late, but I'm surprised nobody has mentioned namedtuples, which accomplish this kind of thing:

Foo = namedtuple('Foo', ['x'])
f = Foo(x='myattribute')
f.x

Python StackOverflow on Twitter: "Python simple naked objects , Python StackOverflow · @pystack. A feed of questions from Stack Overflow tagged Python that meet some criteria. Aiming for 12 tweets a day. Naked is a MIT licensed Python command line application framework that is in development. The current release is an early stable testing version. If you use the libraries at this stage, please watch for changes.

class NakedObject(object):
    pass

myobject = NakedObject()
myobject.foo = 'bar'

9. Classes, Creating a new class creates a new type of object, allowing new instances of that returning the docstring belonging to the class: "A simple example class" . Implementation of the 'naked objects pattern' on .NET platform. Turns a POCO domain model (that follows a few simple conventions) into a complete application. See the ReadMe (at the bottom of this page) for more details.

Understanding the naked object pattern, The naked objects architectural pattern mandates domain object encapsulation of object data. In addition, a user interface has to be created for the following  (All the screenshots and code samples shown in this article are taken from a simple Expenses Processing application, which is included as part of the Naked Objects download.). There are, of course

Naked Objects in Sparta, Sparta provides a simple Python-object-to-RDF binding. It uses eikeon's rdflib, which is based on the code eikeon and I wrote for Redfoot. The Naked Objects framework that was originally hosted on this site has been split into two separate open source projects, and moved: The.NET version, still called Naked Objects, has been moved onto GitHub. The Java version has been fully incorporated into the Apache Isis framework.

Web Component Development with Zope 3, naked objects an appearance, or as wrapping papers that wrap dull boxes to as the simple browser page from Chapter 7: $ python >>> from zope.component​  As, many houses can be made from a description, we can create many objects from a class. An object is also called an instance of a class and the process of creating this object is called instantiation. Defining a Class in Python. Like function definitions begin with the keyword def, in Python, we define a class using the keyword class.

Comments
  • That seems pretty naked to me. What exactly is the threshold that you want to stay below?
  • The python code above is pretty naked, but unfortunately it doesn't actually work.
  • Yeah, that's what I get for commenting too quickly. Of course :)
  • Nice, that is very minimal indeed. Unfortunately also quite unreadable, so I'll go with the first object method you recommend. If anyone has a minimal but readable version I'm still game...
  • Doesn't in fact have to inherit from object: class Dummy(): pass will do fine.
  • Probably. I shy away from old-style classes in Python 2 where possible.
  • To use namedtuple, we should know the attributes in advance, which might not be the case here. You cannot add arbitrary attributes to the objects in this case.
  • I'm looking specifically to use the dot notation for accessing the attributes so the same code that manipulates the django object instances can work on this - so I'd want myobject.foo instead of myobject['foo']
  • That's a dict in python, not an object.