[ESR]
> There's not much I miss from C these days, but one thing I wish Python
> had is a more general for-loop. The C semantics that let you have
> any initialization, any termination test, and any iteration you like
> are rather cool.
>
> Yes, I realize that
>
> for (<init>; <test>; <step>) {<body>}
>
> can be simulated with:
>
> <init>
> while 1:
> if <test>:
> break
> <body>
>
> Still, having them spatially grouped the way a C for does it is nice.
> Makes it easier to see invariants, I think.
Hm, I've seen too many ugly C for loops to have much appreciation for
it. I can recognize and appreciate the few common forms that clearly
iterate over an array; most other forms look rather contorted to me.
Check out the Python C sources; if you find anything more complicated
than ``for (i = n; i > 0; i--)'' I probably didn't write
it. :-)
Common abominations include:
- writing a while loop as for(;<test>;)
- putting arbitrary initialization code in <init>
- having an empty condition, so the <step> becomes an arbitraty
extension of the body that's written out-of-sequence
--Guido van Rossum (home page: http://www.python.org/~guido/)
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