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
SilentGhost had a good answer, but his code actually creates a new object of metaclass type, in other words it creates a class. And classes are objects in Python!
obj = type('obj', (object,), {'propertyName' : 'propertyValue'})
type(obj)
gives
<class 'type'>
To create a new object of a custom or build-in class with dict attributes (aka properties) in one line I'd suggest to just call it:
new_object = type('Foo', (object,), {'name': 'new object'})()
and now
type(new_object)
is
<class '__main__.Foo'>
which means it's an object of class Foo
I hope it helps those who are new to Python.