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Re: Class instantiation fails when passed in a file but work vialine by line interpreter

P: n/a
On Tue, 2008-11-18 at 10:45 -0800, Jeff Tchang wrote:
Odd issue I am having with class instantiation on Python 2.5.2 (Windows).

I have a custom module with a few classes in it. The module is named
There is a copy of it in C:\Python25\Lib\site-packages\

Basically when I try to run a python file that tries to create an
instance of the class Subject I get this error:
AttributeError: type object 'SAML' has no attribute 'Subject'

In I have the class...

class Subject(object):

However, when I run the same line by line by starting up python it works.
import SAML
subject = SAML.Subject("Jo*****","EMailAddress")
print subject
<SAML.Subject object at 0x00C94770>
I've double checked I am loading the correct module by the usage of the -v flag.
What else should I be checking?

Random related question. If you're writing a SAML implementation have
you found an XML Signature implementation that works reliably from
python? I've had a hell of a time finding something that doesn't
segfault and is interoperable with .NET.

As far as your problem goes, I would guess that somewhere you've got a
class named SAML that's shadowing your module. See the difference in the
error messages:

Python 2.5.2 (r252, Oct 31 2008, 10:47:40)
[GCC 4.1.2 (Gentoo 4.1.2 p1.1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>import os
type( os )
<type 'module'>
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'doesnotexist'
>>class os( object ):
.... pass
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: type object 'os' has no attribute 'doesnotexist'

John Krukoff <jk******>
Land Title Guarantee Company

Nov 18 '08 #1
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