devtools/instrument.py
author Rémi Cardona <remi.cardona@logilab.fr>
Fri, 07 Nov 2014 10:33:40 +0100
changeset 10036 16f550b48d57
parent 9368 10694dd136f3
child 10589 7c23b7de2b8d
permissions -rw-r--r--
[web] Override jQueryUI's colors on links (closes #4564046)
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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# copyright 2013 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr -- mailto:contact@logilab.fr
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#
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# This program is free software: you can redistribute it and/or modify it under
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# the terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with this program. If not, see <http://www.gnu.org/licenses/>.
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"""Instrumentation utilities"""
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import os
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try:
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    import pygraphviz
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except ImportError:
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    pygraphviz = None
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from cubicweb.cwvreg import CWRegistryStore
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from cubicweb.devtools.devctl import DevConfiguration
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ALL_COLORS = [
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    "00FF00", "0000FF", "FFFF00", "FF00FF", "00FFFF", "000000",
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    "800000", "008000", "000080", "808000", "800080", "008080", "808080",
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    "C00000", "00C000", "0000C0", "C0C000", "C000C0", "00C0C0", "C0C0C0",
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    "400000", "004000", "000040", "404000", "400040", "004040", "404040",
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    "200000", "002000", "000020", "202000", "200020", "002020", "202020",
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    "600000", "006000", "000060", "606000", "600060", "006060", "606060",
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    "A00000", "00A000", "0000A0", "A0A000", "A000A0", "00A0A0", "A0A0A0",
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    "E00000", "00E000", "0000E0", "E0E000", "E000E0", "00E0E0", "E0E0E0",
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    ]
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_COLORS = {}
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def get_color(key):
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    try:
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        return _COLORS[key]
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    except KeyError:
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        _COLORS[key] = '#'+ALL_COLORS[len(_COLORS) % len(ALL_COLORS)]
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        return _COLORS[key]
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def warn(msg, *args):
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    print 'WARNING: %s' % (msg % args)
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def info(msg):
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    print 'INFO: ' + msg
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class PropagationAnalyzer(object):
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    """Abstract propagation analyzer, providing utility function to extract
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    entities involved in propagation from a schema, as well as propagation
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    rules from hooks (provided they use intrumentalized sets, see
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    :class:`CubeTracerSet`).
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    Concrete classes should at least define `prop_rel` class attribute and
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    implements the `is_root` method.
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    See `localperms` or `nosylist` cubes for example usage (`ccplugin` module).
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    """
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    prop_rel = None # name of the propagation relation
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    def init(self, cube):
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        """Initialize analyze for the given cube, returning the (already loaded)
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        vregistry and a set of entities which we're interested in.
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        """
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        config = DevConfiguration(cube)
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        schema = config.load_schema()
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        vreg = CWRegistryStore(config)
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        vreg.set_schema(schema) # set_schema triggers objects registrations
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        eschemas = set(eschema for eschema in schema.entities()
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                       if self.should_include(eschema))
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        return vreg, eschemas
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    def is_root(self, eschema):
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        """Return `True` if given entity schema is a root of the graph"""
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        raise NotImplementedError()
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    def should_include(self, eschema):
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        """Return `True` if given entity schema should be included by the graph.
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        """
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        if self.prop_rel in eschema.subjrels or self.is_root(eschema):
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            return True
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        return False
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    def prop_edges(self, s_rels, o_rels, eschemas):
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        """Return a set of edges where propagation has been detected.
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        Each edge is defined by a 4-uple (from node, to node, rtype, package)
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        where `rtype` is the relation type bringing from <from node> to <to
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        node> and `package` is the cube adding the rule to the propagation
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        control set (see see :class:`CubeTracerSet`).
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        """
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        schema = iter(eschemas).next().schema
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        prop_edges = set()
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        for rtype in s_rels:
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            found = False
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            for subj, obj in schema.rschema(rtype).rdefs:
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                if subj in eschemas and obj in eschemas:
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                    found = True
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                    prop_edges.add( (subj, obj, rtype, s_rels.value_cube[rtype]) )
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            if not found:
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                warn('no rdef match for %s', rtype)
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        for rtype in o_rels:
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            found = False
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            for subj, obj in schema.rschema(rtype).rdefs:
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                if subj in eschemas and obj in eschemas:
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                    found = True
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                    prop_edges.add( (obj, subj, rtype, o_rels.value_cube[rtype]) )
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            if not found:
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                warn('no rdef match for %s', rtype)
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        return prop_edges
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    def detect_problems(self, eschemas, edges):
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        """Given the set of analyzed entity schemas and edges between them,
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        return a set of entity schemas where a problem has been detected.
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        """
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        problematic = set()
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        for eschema in eschemas:
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            if self.has_problem(eschema, edges):
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                problematic.add(eschema)
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        not_problematic = set(eschemas).difference(problematic)
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        if not_problematic:
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            info('nothing problematic in: %s' %
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                 ', '.join(e.type for e in not_problematic))
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        return problematic
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    def has_problem(self, eschema, edges):
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        """Return `True` if the given schema is considered problematic,
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        considering base propagation rules.
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        """
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        root = self.is_root(eschema)
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        has_prop_rel = self.prop_rel in eschema.subjrels
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        # root but no propagation relation
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        if root and not has_prop_rel:
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            warn('%s is root but miss %s', eschema, self.prop_rel)
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            return True
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        # propagated but without propagation relation / not propagated but
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        # with propagation relation
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        if not has_prop_rel and \
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                any(edge for edge in edges if edge[1] == eschema):
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            warn("%s miss %s but is reached by propagation",
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                 eschema, self.prop_rel)
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            return True
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        elif has_prop_rel and not root:
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            rdef = eschema.rdef(self.prop_rel, takefirst=True)
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            edges = [edge for edge in edges if edge[1] == eschema]
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            if not edges:
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                warn("%s has %s but isn't reached by "
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                     "propagation", eschema, self.prop_rel)
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                return True
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            # require_permission relation / propagation rule not added by
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            # the same cube
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            elif not any(edge for edge in edges if edge[-1] == rdef.package):
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                warn('%s has %s relation / propagation rule'
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                     ' not added by the same cube (%s / %s)', eschema,
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                     self.prop_rel, rdef.package, edges[0][-1])
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                return True
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        return False
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    def init_graph(self, eschemas, edges, problematic):
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        """Initialize and return graph, adding given nodes (entity schemas) and
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        edges between them.
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        Require pygraphviz installed.
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        """
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        if pygraphviz is None:
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            raise RuntimeError('pygraphviz is not installed')
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        graph = pygraphviz.AGraph(strict=False, directed=True)
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        for eschema in eschemas:
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            if eschema in problematic:
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                params = {'color': '#ff0000', 'fontcolor': '#ff0000'}
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            else:
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                params = {}#'color': get_color(eschema.package)}
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            graph.add_node(eschema.type, **params)
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        for subj, obj, rtype, package in edges:
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            graph.add_edge(str(subj), str(obj), label=rtype,
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                           color=get_color(package))
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        return graph
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    def add_colors_legend(self, graph):
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        """Add a legend of used colors to the graph."""
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        for package, color in sorted(_COLORS.iteritems()):
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            graph.add_node(package, color=color, fontcolor=color, shape='record')
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class CubeTracerSet(object):
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    """Dumb set implementation whose purpose is to keep track of which cube is
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    being loaded when something is added to the set.
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    Results will be found in the `value_cube` attribute dictionary.
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    See `localperms` or `nosylist` cubes for example usage (`hooks` module).
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    """
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    def __init__(self, vreg, wrapped):
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        self.vreg = vreg
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        self.wrapped = wrapped
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        self.value_cube = {}
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    def add(self, value):
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        self.wrapped.add(value)
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        cube = self.vreg.currently_loading_cube
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        if value in self.value_cube:
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            warn('%s is propagated by cube %s and cube %s',
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                 value, self.value_cube[value], cube)
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        else:
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            self.value_cube[value] = cube
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    def __iter__(self):
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        return iter(self.wrapped)
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    def __ior__(self, other):
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        for value in other:
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            self.add(value)
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        return self
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    def __ror__(self, other):
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        other |= self.wrapped
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        return other