It seems somewhat illogical to require [#][sign] in that order when the
parts inserted by them go in the opposite order.
So if a specific order is required, then I think it should be reversed.
'=' padding goes in the wrong order too: perhaps -#0=20d makes more sense
than 0=-#20d. I don't find that quite as compelling and I don't think it's
worth having everything go in any order just so that one can. (Then again, I
like the printf style -#020d.)
--- Bruce
On Fri, Jun 6, 2008 at 3:53 PM, Eric Smith
<[EMAIL PROTECTED]<[EMAIL PROTECTED]>>
wrote:
> Nick Coghlan wrote:
>
>> Doing the right thing for negative numbers is a good point. It also means
>> the prefix can be handled properly when dealing with aligned fields. The
>> following update to the standard format specifier in the PEP:
>>
>> [[fill]align][#][sign][0][minimumwidth][.precision][type]
>>
>> The '#' prefix option inserts the appropriate prefix characters ('0b',
>> '0o', '0x', '0X') when displaying numbers in binary, octal or hexadecimal
>> formats. The prefix is inserted into the displayed number after the sign
>> character and fill characters (if any), but before any leading zeroes.
>>
>
> I was implementing this today, and I note that %-formatting doesn't specify
> an order among the #, sign, and 0 flags (at least not that I could tell by
> experimentation). PEP 3101 does say that sign comes before 0 for
> str.format(). Do we want the # to come before sign? Do we want an order at
> all?
>
> This sort of surprised me when I was writing tests. Even after having
> implemented it, I was expecting "-#x" to work, but it needs to be "#-x".
>
> I don't mind there being a fixed order (in fact I prefer it for a number of
> reasons), I just want to make sure that the order specified above is what we
> want to go with.
>
> Eric.
>
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