[Web-SIG] Declaring PEP 3333 accepted (was: PEP 444 != WSGI 2.0)

[Alice Bevan–McGregor]

On 2011-01-06 22:00:17 -0800, Graham Dumpleton said:
> -    environ = {k: wsgi_string(v) for k,v in os.environ.items()}
> +    environ = {k: wsgi_string(v) for k,v in list(os.environ.items())}

2to3 takes the conservative route of assuming your application treats 
dict.items() as a list in all cases; this is not nessicarily true (of 
course), but it is safe, and interestingly, backwards compatible.

> -                    raise exc_info[0], exc_info[1], exc_info[2]
> +                    raise exc_info[0](exc_info[1]).with_traceback(exc_info[2])

The exception raising syntax has changed; you can not re-raise an 
exception using tuple notation any more.  The new syntax is far 
clearer, but I'm unsure of back-compatibility or even if it is possible 
to emulate it completely as a polygot (2.x and 3.x w/ same code).

	- Alice.