[Python-Dev] Unicode proposal: %-formatting ?

[M.-A. Lemburg]

I wonder how we could add %-formatting to Unicode strings without
duplicating the PyString_Format() logic.

First, do we need Unicode object %-formatting at all ?

Second, here is an emulation using strings and <default encoding>
that should give an idea of one could work with the different
encodings:

    s = '%s %i abcäöü' # a Latin-1 encoded string
    t = (u,3)

    # Convert Latin-1 s to a <default encoding> string via Unicode
    s1 = unicode(s,'latin-1').encode()

    # The '%s' will now add u in <default encoding>
    s2 = s1 % t

    # Finally, convert the <default encoding> encoded string to Unicode
    u1 = unicode(s2)

Note that .encode() defaults to the current setting of
<default encoding>.

Provided u maps to Latin-1, an alternative would be:

    u1 = unicode('%s %i abcäöü' % (u.encode('latin-1'),3), 'latin-1')

-- 
Marc-Andre Lemburg
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