On Tue, 09 Jan 2018 16:14:27 +0200, Frank Millman wrote: > Maybe I was not clear. The Context instance is passed as an argument to > many methods. The methods can access the attributes of the instance. The > instance has no methods of its own.
Ah, I see, I misunderstood. [...] >> Alternatively, use a SimpleNamespace: > > I did play with that for a while, but AFAIK it does not allow you to > define read-only attributes. Not directly, no, but you can subclass: py> class Spam(SimpleNamespace): ... @property ... def eggs(self): ... return "foo" ... py> bag = Spam() py> bag.eggs 'foo' py> bag.eggs = 1 Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: can't set attribute However, at the point you are subclassing and adding multiple properties, I'm not sure there's any advantage over just defining a class from scratch. While it is true that SimpleNamespace gives you a nice repr, the properties don't show up in that repr, and I assume it is those read-only attributes that you most care about. -- Steve -- https://mail.python.org/mailman/listinfo/python-list
