How to create inline objects with properties?

Question

In Javascript it would be:

var newObject = { 'propertyName' : 'propertyValue' }; newObject.propertyName;  // returns "propertyValue" 

But the same syntax in Python would create a dictionary, and that's not what I want

new_object = {'propertyName': 'propertyValue'} new_object.propertyName  # raises an AttributeError 

Answer 1

obj = type('obj', (object,), {'propertyName' : 'propertyValue'}) 

there are two kinds of type function uses.

Answer 2

Python 3.3 added the SimpleNamespace class for that exact purpose:

>>> from types import SimpleNamespace  >>> obj = SimpleNamespace(propertyName='propertyValue') >>> obj namespace(propertyName='propertyValue')  >>> obj.propertyName 'propertyValue' 

In addition to the appropriate constructor to build the object, SimpleNamespace defines __repr__ and __eq__ (documented in 3.4) to behave as expected.