Alan G Isaac wrote:
George Brandl explained it to me this way:
It's probably best explained with a bit of code:
>>> class C(object):
... def __str__(self): return '[str]'
... def __unicode__(self): return '[unicode]'
...
>>> "%s %s" % ('foo', C())
'foo [str]'
>>> "%s %s" % (u'foo', C())
u'foo [unicode]'
I.e., as soon as a Unicode element is interpolated into
a string, further interpolations automatically request
Unicode via __unicode__, if it exists.
Even more fun (until you know what is going on):
>>> c = C()
>>> "%s %s %s" % (c, u'c', c)
u'[str] c [unicode]'
--Scott David Daniels
Scott David dani...@acm.org
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