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.

from __future__ import absolute_import


from pyramid.view import view_config
from cubicweb.pyramid.resources import EntityResource, ETypeResource


@view_config(
    route_name='cwentities',
    context=EntityResource,
    request_method='DELETE')
def delete_entity(context, request):
    context.rset.one().cw_delete()
    request.response.status_int = 204
    return request.response


def includeme(config):
    config.add_route(
        'cwentities', '/{etype}/*traverse',
        factory=ETypeResource.from_match('etype'), match_is_etype='etype')
    config.scan(__name__)