change-draft-campaign-target-cpa-adwords-API.py

def change_draft_target_cpa(original_campaign_tcpa, original_campaign_name, draft_campaign_id):
    # Create Portfolio for new campaign
    draft_target_cpa = round(original_campaign_tcpa * (1-0.30), 2)
    draft_portfolio_name = '{0}-Test_XYZ_Draft_Portfolio'.format(original_campaign_name)
    adwords_client = connect_to_adwords_api()
    bidding_strategy_service = adwords_client.GetService('BiddingStrategyService', version='v201809')
    portfolio_config = {
        'name': draft_portfolio_name,
        'biddingScheme': {
            'xsi_type': 'TargetCpaBiddingScheme',
            'targetCpa': {'microAmount': int(round(draft_target_cpa * 1000000))}
        }
    }
    portfolio_operator = 'ADD'
    portfolio = bidding_strategy_service.mutate([{
        'operator': portfolio_operator,
        'operand': portfolio_config
    }])
    portfolio_id = int(portfolio['value'][0]['id'])

    # Assign Portfolio to Draft
    campaign_service = adwords_client.GetService('CampaignService', version='v201809')
    campaign = {
        'id': draft_campaign_id,
        'biddingStrategyConfiguration': {
            'biddingStrategyId': portfolio_id
        }
    }
    campaign_service.mutate([{
        'operator': 'SET',
        'operand': campaign
    }])
    return None
    # Note: draft_campaign_id was returned when running the function that creates a draft