Python SDK is mentioned @ http://www.vmware.com/company/news/releases/vcloud-api.html
So far I've not managed to find it... Perhaps mention of a Python SDK was a reference to libcloud?
Can someone please clarify, because as far as I can tell libcloud is the only public Python based software tool compatible with vCloud REST API (v0.8 at the moment).
For those interested, there is no Python SDK but here's the next best thing, a Python library:
Apache libcloud has vCloud v1.5 API support submitted to SVN trunk. Pending inclusion in v1.0 release.
Almost 4 years later... not sure if this is what you were looking for, but https://github.com/vmware/pyvmomi
There seems to be a download link on vmware, but I couldn't get it to function... I think the github repo is the same and latest. Your question came up in a search while I was looking for it today, so I figure a pointer to github might save 15 minutes of searching for any others trying to get started...
and for some additional sample code: https://github.com/vmware/pyvmomi-community-samples