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

[John Krukoff]

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 SAML.py.
There is a copy of it in C:\Python25\Lib \site-packages\SAML.p y.
>
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 SAML.py I have the class...
>
class Subject(object) :
...
...
etc
>
However, when I run the same line by line by starting up python it works.
>

import SAML
subject = SAML.Subject("J ohnDoe@example. com","EMailAddr ess")
>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?
>
-Jeff
--
http://mail.python.org/mailman/listinfo/python-list

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'>

>>os.doesnotexi st

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'doesnotexist'

>>class os( object ):

.... pass
....

>>os.doesnotexi st

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: type object 'os' has no attribute 'doesnotexist'

--
John Krukoff <jkrukoff@ltgc. com>
Land Title Guarantee Company