dynamic classes and duck typing

[Andrei Alexandrescu]

Walter Bright wrote:
> Leandro Lucarella wrote:
>> with file(fname) as f:
>>     x = f.read(10)
>>     f.write(x)
> 
> Looks like you're right, and it's a recently added new feature. I 
> suggest it proves my point - Python had to add complexity to support 
> another paradigm. Python's "with" doesn't look any simpler than scope 
> guard.

Actually "with" is an awful abstraction as defined in Java (the new 
version), C#, and Python. Scheme also has am unwind-protect function. I 
strongly believe all of the above are hopelessly misguided. Scope guard 
is the right thing, and I am convinced it will prevail.


Andrei