使用python boto检索安全组但设置vpc id

i am trying to play around with python boto and i run the below example(below is the official doc for this). I know for a fact that an SG called "Pub_HDP_SG" exist but when i try to run my command by passing in a parameter called groupnames i get below error. I get the fact that this SG does not exist in my default VPC, so how do i set my VPC to a specific VPC ?? i am trying to play around with python boto and