On 03/06/2014 11:46 PM, Crístian Viana
wrote:
Am 06-03-2014 12:12, schrieb Sheldon:
AFAK， seems two types has no string representation, one is
unicode and another is object derived from nothing.
The statement if not isinstance(value, unicode), which
is in the sample code above, makes sure that we will not try to
convert a unicode object to string (only those who have a
different type).
I have forgot to tell one result I have tried:
In [24]: u"fǒǒ = %s" % "fǒǒ"
---------------------------------------------------------------------------
UnicodeDecodeError Traceback (most recent
call last)
only this case need the statement if not isinstance(value,
unicode),
In [23]: u"fǒǒ = %s" % u"fǒǒ"
Out[23]: u'f\u01d2\u01d2 = f\u01d2\u01d2'
not find other case.
if you find, you can tell us.
Thanks.
And an object derived from nothing also has a string
representation. Take a look at this example:
>>> class X():
... def x(self):
... pass
...
>>> a = X()
>>> print str(a)
<__main__.X instance at 0x7f8fe13d4b00>
>>> print "this is a string: %s." % a
this is a string: <__main__.X instance at
0x7f8fe13d4b00>.
But I'm not worry about it.
IMO, no one will not pass this instance of object to
KimchiException as args.
IMO, we should never trust that the users/developers will pass the
correct parameters to our code. Eventually, someone will forget
that, and then we will have one more bug ;)
--
Thanks and best regards!
Sheldon Feng(冯少合)<shaohef@linux.vnet.ibm.com>
IBM Linux Technology Center