Sub-classing unicode: getting the unicode value

[Torsten Bronger]

Hallöchen!

John Machin writes:

> On Dec 31, 8:08 am, Torsten Bronger <bron... at physik.rwth-aachen.de>
> wrote:
>
>> [...]
>>
>> But then it is not unicode but Excerpt which I don't want.  The
>> idea is to buffer the unicode representation in order to gain
>> efficiency.  Otherwise, a lot of unicode conversion would take
>> place.
>
> I'm confused: you are subclassing unicode, and want to use several
> unicode methods, but the object's value appears to be an 8-bit
> string!?!?

No, a unicode.  Never said something else ...

> Care to divulge the code for your __init__ method?

It has no __init__, only a __new__.  But I doubt that it is of much
use here:

    def __new__(cls, excerpt, mode, url=None,
                pre_substitutions=None, post_substitutions=None):
        if mode == "NONE":
            instance = unicode.__new__(cls, excerpt)
        elif mode == "PRE":
            preprocessed_text, original_positions, escaped_positions = \
                cls.apply_pre_input_method(excerpt, url, pre_substitutions)
            instance = unicode.__new__(cls, preprocessed_text)
            instance.original_text = unicode(excerpt)
            instance.original_positions = original_positions
            instance.escaped_positions = escaped_positions
            instance.post_substitutions = post_substitutions
        elif mode == "POST":
            postprocessed_text, original_positions, escaped_positions = \
                cls.apply_post_input_method(excerpt)
            instance = unicode.__new__(cls, postprocessed_text)
            instance.original_positions = original_positions
            instance.escaped_positions = escaped_positions
            instance.original_text = excerpt.original_text
            instance.post_substitutions = post_substitutions
        instance.__escaped_text = None
        instance.__unicode = None
        return instance


Tschö,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
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