Laszlo Nagy wrote:
> This program:
>
> import sys
> import traceback
> import cStringIO
>
> a = 1.0
> b = 0.0
> try:
> c=a/b
> except:
> f = cStringIO.StringIO('')
> ei = sys.exc_info()
> traceback.print_exception(ei[0],ei[1],ei[2],file=f)
>
> raises this exception:
>
> Traceback (most recent call last):
> File "C:/Documents and Settings/gandalf/test.py", line 12, in ?
> traceback.print_exception(ei[0],ei[1],ei[2],file=f)
> File "C:\Python24\Lib\traceback.py", line 124, in print_exception
> _print(file, 'Traceback (most recent call last):')
> File "C:\Python24\Lib\traceback.py", line 13, in _print
> file.write(str+terminator)
> AttributeError: 'cStringIO.StringI' object has no attribute 'write'
>
> What is 'cStringIO.StringI' anyway? Shouldn't it be 'cStringIO.StringIO'?
>
Nope. StringI is an input-only object, StringO is an output object. You
got a StringI because you gave a string argument to the creator.
>>> f1 = cStringIO.StringIO()
>>> f1
<cStringIO.StringO object at 0x186c9c00>
>>> dir(f1)
['__class__', '__delattr__', '__doc__', '__getattribute__', '__hash__',
'__init__', '__iter__', '__new__', '__reduce__', '__reduce_ex__',
'__repr__', '__setattr__', '__str__', 'close', 'closed', 'flush',
'getvalue', 'isatty', 'next', 'read', 'readline', 'readlines', 'reset',
'seek', 'softspace', 'tell', 'truncate', 'write', 'writelines']
>>> f2 = cStringIO.StringIO("This is the fixed content of the StringIO")
>>> f2
<cStringIO.StringI object at 0x18661440>
>>> dir(f2)
['__class__', '__delattr__', '__doc__', '__getattribute__', '__hash__',
'__init__', '__iter__', '__new__', '__reduce__', '__reduce_ex__',
'__repr__', '__setattr__', '__str__', 'close', 'closed', 'flush',
'getvalue', 'isatty', 'next', 'read', 'readline', 'readlines', 'reset',
'seek', 'tell', 'truncate']
>>>
regards
Steve
--
Steve Holden +44 150 684 7255 +1 800 494 3119
Holden Web LLC/Ltd http://www.holdenweb.com
Skype: holdenweb http://holdenweb.blogspot.com
Recent Ramblings http://del.icio.us/steve.holden
--
http://mail.python.org/mailman/listinfo/python-list
