Fix broken flake8 configuration and flake8 errors which were hidden by this breakage. flake8 --filename options doesn't work as expected: * it's expected to be a shell pattern, using stdlib's fnmatch.fnmatch function internally. This funciton thinks that 'cubicweb/x.py' doesn't match 'cubicweb/x.py' (there must be a reason but that's not the point), hence no file was actually checked ; * as this is a list of pattern, each encountered file is checked against each pattern, leading to run time explosion. So maintain list of files to check in a separated file and give this list to flake8 using unix's xarg command.

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from __future__ import absolute_import

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from pyramid.view import view_config

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from cubicweb.pyramid.resources import EntityResource, ETypeResource

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@view_config(

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    route_name='cwentities',

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    context=EntityResource,

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    request_method='DELETE')

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def delete_entity(context, request):

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    context.rset.one().cw_delete()

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    request.response.status_int = 204

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    return request.response

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def includeme(config):

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    config.add_route(

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        'cwentities', '/{etype}/*traverse',

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        factory=ETypeResource.from_match('etype'), match_is_etype='etype')

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    config.scan(__name__)