How to test if a module exists?

[Lawrence D'Oliveiro]

In message <mailman.853.1289449099.2218.python-list at python.org>, Jon 
Dufresne wrote:

> On Wed, Nov 10, 2010 at 1:50 AM, Lawrence D'Oliveiro wrote:
>
>> In message <mailman.780.1289326087.2218.python-list at python.org>, Jon
>> Dufresne wrote:
>>
>>> On Mon, Nov 8, 2010 at 11:35 PM, Lawrence D'Oliveiro ...
>>
>> I see that you published my unobfuscated e-mail address on USENET for all
>> to see. I obfuscated it for a reason, to keep the spammers away. I'm
>> assuming this was a momentary lapse of judgement, for which I expect an
>> apology. Otherwise, it becomes grounds for an abuse complaint to your
>> ISP.
>>
> 
> Is this for real? I did a "replay all" to respond to your post. What
> are you suggesting? I don't see anything that looks like an obfuscated
> email.

Tell me what you see here, for example
<http://mail.python.org/pipermail/python-list/2010-November/1260153.html>.