googleads error

test.py

# Import appropriate modules from the client library.
from googleads import dfp

# Set the line item ID and creative IDs to associate.
LINE_ITEM_ID = 'INSERT_LINE_ITEM_ID_HERE'
CREATIVE_IDS = ['INSERT_CREATIVE_IDS_HERE']


def main(client, line_item_id, creative_ids):
    # Initialize appropriate service.
    lica_service = client.GetService(
        'LineItemCreativeAssociationService', version='v201408')

    licas = []
    for creative_id in creative_ids:
        licas.append({'creativeId': creative_id,
                      'lineItemId': line_item_id,
                      'manualCreativeRotationWeight': 0.3 # add a manual rotation weight
        })

    # Create the LICAs remotely.
    licas = lica_service.createLineItemCreativeAssociations(licas)

    # Display results.
    if licas:
        for lica in licas:
            print ('LICA with line item id \'%s\', creative id \'%s\', and '
                   'status \'%s\' was created.' %
                   (lica['lineItemId'], lica['creativeId'], lica['status']))
    else:
        print 'No LICAs created.'


if __name__ == '__main__':
    # Initialize client object.
    dfp_client = dfp.DfpClient.LoadFromStorage()
    main(dfp_client, LINE_ITEM_ID, CREATIVE_IDS)