Guido van Rossum <[EMAIL PROTECTED]> wrote:
>
> I've written a PEP about this topic. It's PEP 340: Anonymous Block
> Statements (http://python.org/peps/pep-0340.html).
>
> Some highlights:
>
> - temporarily sidestepping the syntax by proposing 'block' instead of 'with'
> - __next__() argument simplified to StopIteration or ContinueIteration
> instance
> - use "continue EXPR" to pass a value to the generator
> - generator exception handling explained
Your code for the translation of a standard for loop is flawed. From
the PEP:
for VAR1 in EXPR1:
BLOCK1
else:
BLOCK2
will be translated as follows:
itr = iter(EXPR1)
arg = None
while True:
try:
VAR1 = next(itr, arg)
finally:
break
arg = None
BLOCK1
else:
BLOCK2
Note that in the translated version, BLOCK2 can only ever execute if
next raises a StopIteration in the call, and BLOCK1 will never be
executed because of the 'break' in the finally clause.
Unless it is too early for me, I believe what you wanted is...
itr = iter(EXPR1)
arg = None
while True:
VAR1 = next(itr, arg)
arg = None
BLOCK1
else:
BLOCK2
- Josiah
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