'Connects to a given region if it exists, raises RegionDoesNotExist
otherwise. Once connected, this object will return only data from the
given region.'

def connect_to_region(self, region_name):

    region = self.get_region(region_name)
    self._kwargs['region'] = region
    self._platforms = None
    self._default_vpc = None
    self.reload()
    return self
