Strange error with getattr() function

[Hole]

Hi There!

I'm trying to use Zope and the product OpenFlow.

I got the following error while I was using the built-in function
getattr() to retrieve an OpenFlow object:

attribute name must be string


Actually, I surely pass a string as attribute name to getattr()

The code:

#following instruction returns me the string "WorkFlowTest"
openflow_id=container.aq_parent.id

if (hasattr(container,openflow_id):
#the interpreter enter in this block, so
#it's sure that container has an attribute called WorkFlowTest
openflow=getattr(container,openflow_id)

At this point, I got the error: attribute name must be string

The *strange* is that I get the same error even if I pass the attribute
name to the getattr() function as pure string:

getattr(container,"WorkFlowTest")

(sic!!!!!)

I'm a lot confused!
Thanks in advance.

 

[Hole]

Hole ha scritto:

Hi There!

I'm trying to use Zope and the product OpenFlow.

I got the following error while I was using the built-in function
getattr() to retrieve an OpenFlow object:

attribute name must be string


Actually, I surely pass a string as attribute name to getattr()

The code:

#following instruction returns me the string "WorkFlowTest"
openflow_id=container.aq_parent.id

if (hasattr(container,openflow_id):
#the interpreter enter in this block, so
#it's sure that container has an attribute called WorkFlowTest
openflow=getattr(container,openflow_id)

At this point, I got the error: attribute name must be string

I'm wondering if the exception is raised in a hidden function and not
in the explicit call to getattr(). How can I view the traceback in a
script running in zope??

 

[Gabriel Genellina]

I'm trying to use Zope and the product OpenFlow.

Try posting in the Zope list, you surely will have more responses.

I got the following error while I was using the built-in function
getattr() to retrieve an OpenFlow object:

attribute name must be string


Actually, I surely pass a string as attribute name to getattr()

The code:

#following instruction returns me the string "WorkFlowTest"
openflow_id=container.aq_parent.id

Are you sure it's a string? Some objects have an id() method. You
always should use getId().

if (hasattr(container,openflow_id):
#the interpreter enter in this block, so
#it's sure that container has an attribute called WorkFlowTest
openflow=getattr(container,openflow_id)

At this point, I got the error: attribute name must be string

getattr is acquisition-aware so you might be retrieving another thing...

The *strange* is that I get the same error even if I pass the attribute
name to the getattr() function as pure string:

getattr(container,"WorkFlowTest")
(sic!!!!!)

If you're really sure of this, I think the error may occur inside
another function in the getattr chain.



--
Gabriel Genellina
Softlab SRL






__________________________________________________
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Todo lo que querías saber, y lo que ni imaginabas,
está en Yahoo! Respuestas (Beta).
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[Gabriel Genellina]

I'm wondering if the exception is raised in a hidden function and not
in the explicit call to getattr(). How can I view the traceback in a
script running in zope??

(Which Zope version?)
If you don't catch the exception, an error page will be displayed,
pointing to the error_log object.


--
Gabriel Genellina
Softlab SRL






__________________________________________________
Preguntá. Respondé. Descubrí.
Todo lo que querías saber, y lo que ni imaginabas,
está en Yahoo! Respuestas (Beta).
¡Probalo ya!
http://www.yahoo.com.ar/respuestas

 

[Hole]

Gabriel Genellina ha scritto:

(Which Zope version?)
If you don't catch the exception, an error page will be displayed,
pointing to the error_log object.

Hi Gabriel,

thanks a lot for your replies.

I've resolved the problem catching the exception and printing the
traceback in a file.

The problem was, indeed, in a getattr() call performed in another
function, to which I passed an int rather than a string.

Bye!