pyGoogle - restrict by country doesn't seem to work

[dananrg at yahoo.com]

If I want to restrict search results by country, what precisely do I
need to include in searchTerm variable below?

I've tried:

searchTerm = 'restrict:countryUS blah blah'
searchTerm = '<restrict> countryUS blah blah'

Neither work. What am I doing wrong?

import google
data = google.doGoogleSearch(searchTerm)

Thanks