>>> for category in response.categories():
>>> print category.category_id, category.label, category.score
11000000 politics 0.936274
11006000 politics>government 0.899296
11024000 politics>politics (general) 0.856208
04017000 economy, business and finance>economy (general) 0.772154
08003000 human interest>people 0.661979
12006001 religion and belief>values>ethics 0.650902
04018000 economy, business and finance>business (general) 0.650722
14025000 social issue>social issues (general) 0.637389
04006000 economy, business and finance>financial and business service 0.637093
14000000 social issue 0.5628
04006002 economy, business and finance>financial and business service>banking 0.561675
.....