why this is wrong?

[bruce.who.hk]

Hi, all

I just donnot know why this is wrong, you can test it in python shell:

class B:
    def __str__(self):
        return u'\u5929\u4e0b'
    
b=B()
str(b)
Traceback (most recent call last):
  File "<input>", line 1, in ?
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-1: ordinal not in range(128)

Could anybody point me out?
 				
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bruce.who.hk
2006-10-09