[Zope] File I/O in Zope

[Jason Earl]

csnorville@fedex.com writes:

> Hi Everyone, 

Hello

> I am fairly new to Zope and I need some assitance on something that
> I know is fundamental so please don't beat up on me too bad ;-)

I haven't been a member of this list for too terribly long, but the
folks here seem to be pretty darn friendly.

> I am try to open a file with a Python Script in Zope for content
> manipulation. This is a text file, I basically want to read a
> number, operate on it and write it back out.  However when I try to
> get my file handle I get;

You are going to need to use an External Method (or a Product) for
this.  The Zope based Python scripts only offer a "safe" subset of
Python.  Opening files on the filesystem is not a part of this "safe"
subset.

> file=open("/home/chris/misernumber", "r+") 
> 
> Zope Error 
> 
>            Zope has encountered an error while publishing this resource.
> 
>            Error Type: NameError 
>            Error Value: global name 'open' is not defined 
> 
> I tried creating the file as a Zope object but I get the same error.
> Again I know this is fundamental. If ya'll can help me with this, or
> at least point me to some documentation it would be deeply
> appreciated.

There probably is a way to do this with Zope objects, but it wouldn't
be using open().  There is a whole slew of methods for manipulating
Zope objects, check the Zope API section in the Zope Book.

Depending on what you are actually trying to do there might be a more
Zope-like way of accomplishing it than with the External Method
hammer, but without knowing what you are trying to do it is hard to
guess what that more Zope-like thing should be.

Jason