Sam Pointon <[EMAIL PROTECTED]> wrote:
...
> So, assuming you want a Things object to break if either a) all three
> arguments aren't sequences of the same length, or b) all three
> arguments aren't a number (or string, or whatever), this should work:
>
> #Not tested.
> class Things(object):
> def __init__(self, x, y, z):
> try:
> if not (len(x) == len(y) and len(y) == len(z)):
> raise ValueError('Things don't match up.')
Careful though: this does NOT treat a string as a scalar, as per your
parenthetical note, but rather as a sequence, since it does respond
correctly to len(...). You may need to specialcase with checks on
something like isinstance(x,basestring) if you want to treat strings as
scalars.
Alex
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