[Python-Dev] Another StringIO/cStringIO discrepancy

Fri Nov 18 17:30:33 CET 2005

Guido van Rossum wrote:
> On 11/18/05, Walter Dörwald <walter at livinglogic.de> wrote:
>>> >>> import StringIO, cStringIO
>> >>> s = StringIO.StringIO()
>> >>> s.truncate(-42)
>>Traceback (most recent call last):
>> File "<stdin>", line 1, in ?
>> File "/usr/local/lib/python2.4/StringIO.py", line 203, in truncate
>> raise IOError(EINVAL, "Negative size not allowed")
>>IOError: [Errno 22] Negative size not allowed
>> >>> s = cStringIO.StringIO()
>> >>> s.truncate(-42)
>> >>>
>>> Well, what does a regular file say in this case?

IOError: [Errno 22] Invalid argument
Bye,
 Walter Dörwald