[Python-ideas] Variable-length, homogeneous tuple: why?

[Bruce Leban]

On Sun, Aug 17, 2014 at 3:53 AM, Ben Finney <ben+python at benfinney.id.au>
wrote:

> A homogeneous sequence would imply there are deliberately *no* specific
> meanings to each position.
>

That's a set. A sequence implies order matters in some way.


> The value 7.03 would have the same semantic
> value at any position in the sequence.
>

Not at all. The 7 implies a units value, the 0 is a tenths value and the 3
is the hundredths. Those are different semantics. In Roman numerals before
they invented subtraction, XVI = VIX so order did not matter. Roman
numerals were basically sets of numbers to be added.

Here's another: (KentuckyDerby, PreaknessStakes, BelmontStakes) -- these
three objects are all instances of the class StakesRace and the order is
significant.

--- Bruce
Learn how hackers think: http://j.mp/gruyere-security
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