Adam Olsen wrote:
> On 8/15/07, Ron Adam <[EMAIL PROTECTED]> wrote:
>>
>> Andrew James Wade wrote:
>>> On Tue, 14 Aug 2007 21:12:32 -0500
>>> Ron Adam <[EMAIL PROTECTED]> wrote:
>>>> What I was thinking of was just a simple left to right evaluation order.
>>>>
>>>> "{0:spec1, spec2, ... }".format(x)
>>>>
>>>> I don't expect this will ever get very long.
>>> The first __format__ will return a str, so chains longer than 2 don't
>>> make a lot of sense. And the delimiter character should be allowed in
>>> spec1; limiting the length of the chain to 2 allows that without escaping:
>>>
>>> "{0:spec1-with-embedded-comma,}".format(x)
>>>
>>> My scheme did the same sort of thing with spec1 and spec2 reversed.
>>> Your order makes more intuitive sense; I chose my order because I
>>> wanted the syntax to be a generalization of formatting strings.
>> >
>>> Handling the chaining within the __format__ methods should be all of
>>> two lines of boilerplate per method.
>> I went ahead and tried this out and it actually cleared up some difficulty
>> in organizing the parsing code. That was a very nice surprise. :)
>>
>> (actual doctest)
>>
>> >>> import time
>> >>> class GetTime(object):
>> ... def __init__(self, time=time.gmtime()):
>> ... self.time = time
>> ... def __format__(self, spec):
>> ... return fstr(time.strftime(spec, self.time))
>>
>> >>> start = GetTime(time.gmtime(1187154773.0085449))
>>
>> >>> fstr("Start: {0:%d/%m/%Y %H:%M:%S,<30}").format(start)
>> 'Start: 15/08/2007 05:12:53 '
>
> Caveat: some date formats include a comma. I think the only
> workaround would be splitting them into separate formats (and using
> the input date twice).
Maybe having an escaped comma? '\,'
It really isn't any different than escaping quotes. It could be limited to
just inside format {} expressions I think.
Using raw strings with '\54' won't work.
Ron
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