[clear] Python packages for email authentication

[David MacQuigg]

At 11:37 AM 8/23/2005 +0100, David Wilson wrote:

>Richard Kay wrote:
>
>>>0.3x is a version in transition from .3 to .4.  I think its OK, because 
>>>it was *after* I changed the name from pyCSV.py to csv.py, but you may 
>>>want to download version 0.4 just to be 
>>>sure.  http://purl.net/macquigg/email/python
>
>>Have done this. Comparing the version linked from this page ( 0.3x ) to 
>>the .4 version (csv.py) on:
>
>The name csv.py conflicts with the Comma Separated File module present in 
>Python 2.3 and upwards. This means that a program can't use both modules 
>unless it artificially places your csv.py in a package directory so that 
>it doesn't exist on the 'primary' module path:
>
>         import csv
>
>When csv.py is in the current working directory, or the package directory 
>for the currently executing module, it will always shadow the stdlib's csv.py.
>
>The only way I can see around this is renaming, or creating a dummy 
>package (and dummy __init__.py), and placing csv.py within that. eg:
>
>         import dummy.csv as csv
>
>
>Might I suggest you create a package called "CLEAR" or "clear", and 
>distribute csv.py as part of that? It would then natural for a BATV 
>implementation to live inside that as batv.py. eg:
>
>         from clear import csv, batv
>         from clear.csv import *

I've created two packages, one for Linux, one for Windows, which should 
avoid the name conflicts.
http://purl.net/macquigg/email/python email_auth(.tgz, .zip)  These 
packages contain two modules (csv.py and spf.py).  I think 'email_auth' 
might be a more neutral name than 'clear' (unless CLEAR wants to broaden 
its mission).

Unzip (or un-tar) the appropriate package, copy the email_auth directory to 
a directory on your Python sys.path, and you should be able to use these 
modules with statements like:

     # Authentication methods available at this site:
     from email_auth import spf
             # SPF1 from sourceforge.net/projects/pymilter - milter-0.8.2
     from email_auth import csv  # based on spec from mipassoc.org/csv
     ##import sid  # SenderID from Microsoft
     # Methods that require transfer of DATA:
     ##import dkim # from Yahoo/Cisco

Having avoided name conflicts with other modules, we can now call the csa 
function from the csv module like this:

     result, SMTP_reply = csv.csa(IP, HELO)


The checkID() module has not yet been added to the package, as it needs a 
little more testing.

--
Dave
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