run with_items loop using python api.

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for a bigger project we are interfacing ansible with python using the python api. 

however I am not able to run the debug module using a with_items loop. 

the purpose is to find/report and delete the files found on remote systems. 

play_source = dict(

    name="Ansible Play",

    hosts='all',

    gather_facts='no',

    vars=dict(sudo_content=sudoers_content),

    tasks=[

        dict(action=dict(module='find',

                         file_type='file',

                         paths = '/etc',

                         age= '14d',

                         use_regex = 'True',

                         patterns='sudoers(?=\\.).*'), register='output'),

        dict(action=dict(module='debug', args=dict(msg='{{ item.path}}'), with_items='{{ output.files}}'))

    ]

    )

this executes fine the files are found but the debug task fails due to item variable is undefined.

fatal: [vm]: FAILED! =>

  msg: 'The task includes an option with an undefined variable. The error was: ''item'' is undefined'

how can  i make the loop work? 

thanks