In c.l.p, Henry Thompson wondered why printing would ignore
__unicode__. Consider this:
import codecs
stream = codecs.open("/tmp/bla","w", encoding="cp1252")
class Foo:
def __unicode__(self):
return u"\N{EURO SIGN}"
foo = Foo()
print >>stream, foo
This succeeds, but /tmp/bla now contains
<__main__.Foo instance at 0x4026e68c>
He argues that it instead should invoke __unicode__, similar to
invoking automatically __str__ when writing to a byte stream.
I agree that this is desirable, but I wonder what the best approach
would be:
A. Printing tries __str__, __unicode__, and __repr__, in this order.
B. A file indicates "unicode-awareness" somehow. For a Unicode-aware
file, it tries __unicode__, __str__, and __repr__, in order.
C. A file indicates that it is "unicode-requiring" somehow. For a
unicode-requiring file, it tries __unicode__; if that fails, it
tries __repr__ and converts the result to Unicode.
Which of these, if any, would be most Pythonish?
Regards,
Martin
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