Selecting unique values

[Kumar Mainali]

Greetings

I have a dataset with occurrence records of multiple species. I need to get
rid of multiple listings of the same occurrence point for a species (as you
see below in red and blue typeface). How do I create a dataset only with
unique set of longitude and latitude for each species? Thanks in advance.

Species_name Longitude Latitude
Abies concolor -106.601 35.868
Abies concolor -106.493 35.9682
Abies concolor -106.489 35.892
Abies concolor -106.496 35.8542
Accipiter cooperi -119.688 34.4339
Accipiter cooperi -119.792 34.5069
Accipiter cooperi -118.797 34.2581
Accipiter cooperi -77.38333 39.68333
Accipiter cooperi -77.38333 39.68333
Accipiter cooperi -75.99153 40.633335
Accipiter cooperi -75.99153 40.633335

- Kumar
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20110725/e71cdad1/attachment.html>