'Associate a set of Dhcp Options with a VPC.
:type dhcp_options_id: str
:param dhcp_options_id: The ID of the Dhcp Options
:type vpc_id: str
:param vpc_id: The ID of the VPC.
:type dry_run: bool
:param dry_run: Set to True if the operation should not actually run.
:rtype: bool
:return: True if successful'

def associate_dhcp_options(self, dhcp_options_id, vpc_id, dry_run=False):

    params = {'DhcpOptionsId': dhcp_options_id, 'VpcId': vpc_id}
    if dry_run:
        params['DryRun'] = 'true'
    return self.get_status('AssociateDhcpOptions', params)
