clusters.py
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import snakes.plugins
from snakes.plugins import new_instance
from snakes.pnml import Tree
from snakes.data import iterate
class Cluster (object) :
def __init__ (self, nodes=[], children=[]) :
"""
>>> Cluster(['a', 'b'],
... [Cluster(['1', '2'],
... [Cluster(['A'])]),
... Cluster(['3', '4', '5'],
... [Cluster(['C', 'D'])])])
Cluster(...)
"""
self._nodes = set(nodes)
self._children = []
self._cluster = {}
for child in children :
self.add_child(child)
__pnmltag__ = "clusters"
def __pnmldump__ (self) :
"""
>>> Cluster(['a', 'b'],
... [Cluster(['1', '2'],
... [Cluster(['A'])]),
... Cluster(['3', '4', '5'],
... [Cluster(['C', 'D'])])]).__pnmldump__()
<?xml version="1.0" encoding="utf-8"?>
<pnml>...
<clusters>
<node>
...
</node>
<node>
...
</node>
<clusters>
...
</clusters>
</clusters>
</pnml>
"""
result = Tree(self.__pnmltag__, None)
for node in self._nodes :
result.add_child(Tree("node", node))
for child in self._children :
result.add_child(Tree.from_obj(child))
return result
@classmethod
def __pnmlload__ (cls, tree) :
"""
>>> t = Cluster(['a', 'b'],
... [Cluster(['1', '2'],
... [Cluster(['A'])]),
... Cluster(['3', '4', '5'],
... [Cluster(['C', 'D'])])]).__pnmldump__()
>>> Cluster.__pnmlload__(t)
Cluster(['...', '...'],
[Cluster(['...', '...'],
[Cluster(['A'], [])]),
Cluster(['...', '...', '...'],
[Cluster(['...', '...'], [])])])
"""
result = cls()
for child in tree.children :
if child.name == "node" :
result.add_node(child.data)
else :
result.add_child(child.to_obj())
return result
def __str__ (self) :
return "cluster_%s" % str(id(self)).replace("-", "m")
def __repr__ (self) :
"""
>>> Cluster(['a', 'b'],
... [Cluster(['1', '2'],
... [Cluster(['A'])]),
... Cluster(['3', '4', '5'],
... [Cluster(['C', 'D'])])])
Cluster(['...', '...'],
[Cluster(['...', '...'],
[Cluster(['A'], [])]),
Cluster(['...', '...', '...'],
[Cluster(['...', '...'], [])])])
"""
return "%s([%s], [%s])" % (self.__class__.__name__,
", ".join(repr(n) for n in self.nodes()),
", ".join(repr(c) for c in self.children()))
def copy (self) :
"""
>>> Cluster(['a', 'b'],
... [Cluster(['1', '2'],
... [Cluster(['A'])]),
... Cluster(['3', '4', '5'],
... [Cluster(['C', 'D'])])]).copy()
Cluster(['...', '...'],
[Cluster(['...', '...'],
[Cluster(['A'], [])]),
Cluster(['...', '...', '...'],
[Cluster(['...', '...'], [])])])
"""
return self.__class__(self._nodes,
(child.copy() for child in self._children))
def get_path (self, name) :
"""
>>> Cluster(['a', 'b'],
... [Cluster(['1', '2'],
... [Cluster(['A'])]),
... Cluster(['3', '4', '5'],
... [Cluster(['C', 'D'])])]).get_path('C')
[1, 0]
"""
if name in self._nodes :
return []
else :
for num, child in enumerate(self._children) :
if name in child :
return [num] + child.get_path(name)
def add_node (self, name, path=None) :
"""
>>> c = Cluster(['a', 'b'],
... [Cluster(['1', '2'],
... [Cluster(['A'])]),
... Cluster(['3', '4', '5'],
... [Cluster(['C', 'D'])])])
>>> c.add_node('c')
Cluster([...'c'...], ...)
>>> c.add_node('E', [1, 0])
Cluster([...'E'...], [])
>>> c
Cluster([...'c'...],
[Cluster(['...', '...'],
[Cluster(['A'], [])]),
Cluster(['...', '...', '...'],
[Cluster([...'E'...], [])])])
"""
if path in (None, [], ()) :
self._nodes.add(name)
return self
else :
while len(self._children) <= path[0] :
self._children.append(self.__class__())
target = self._children[path[0]].add_node(name, path[1:])
self._cluster[name] = target
return target
def remove_node (self, name) :
"""
>>> c = Cluster(['a', 'b'],
... [Cluster(['1', '2'],
... [Cluster(['A'])]),
... Cluster(['3', '4', '5'],
... [Cluster(['C', 'D'])])])
>>> c.remove_node('4')
>>> c
Cluster(['...', '...'],
[Cluster(['...', '...'],
[Cluster(['A'], [])]),
Cluster(['...', '...'],
[Cluster(['...', '...'], [])])])
"""
if name in self._cluster :
self._cluster[name].remove_node(name)
else :
self._nodes.remove(name)
def rename_node (self, old, new) :
"""
>>> c = Cluster(['a', 'b'],
... [Cluster(['1', '2'],
... [Cluster(['A'])]),
... Cluster(['3', '4', '5'],
... [Cluster(['C', 'D'])])])
>>> c.rename_node('4', '42')
>>> c
Cluster(['...', '...'],
[Cluster(['...', '...'],
[Cluster(['A'], [])]),
Cluster([...'42'...],
[Cluster(['...', '...'], [])])])
"""
if old in self._cluster :
self._cluster[old].rename_node(old, new)
self._cluster[new] = self._cluster[old]
del self._cluster[old]
elif old in self._nodes :
self._nodes.remove(old)
self._nodes.add(new)
else :
for child in self.children() :
child.rename_node(old, new)
def add_child (self, cluster=None) :
"""
>>> c = Cluster(['a', 'b'],
... [Cluster(['1', '2'],
... [Cluster(['A'])]),
... Cluster(['3', '4', '5'],
... [Cluster(['C', 'D'])])])
>>> c.add_child(c.copy())
>>> c
Cluster(['...', '...'],
[Cluster(['...', '...'],
[Cluster(['A'], [])]),
Cluster(['...', '...', '...'],
[Cluster(['...', '...'], [])]),
Cluster(['...', '...'],
[Cluster(['...', '...'],
[Cluster(['A'], [])]),
Cluster(['...', '...', '...'],
[Cluster(['...', '...'], [])])])])
"""
if cluster is None :
cluster = Cluster()
self._cluster.update(cluster._cluster)
for node in cluster._nodes :
self._cluster[node] = cluster
self._children.append(cluster)
def nodes (self, all=False) :
"""
>>> list(sorted(Cluster(['a', 'b'],
... [Cluster(['1', '2'],
... [Cluster(['A'])]),
... Cluster(['3', '4', '5'],
... [Cluster(['C', 'D'])])]).nodes()))
['a', 'b']
>>> list(sorted(Cluster(['a', 'b'],
... [Cluster(['1', '2'],
... [Cluster(['A'])]),
... Cluster(['3', '4', '5'],
... [Cluster(['C', 'D'])])]).nodes(True)))
['1', '2', '3', '4', '5', 'A', 'C', 'D', 'a', 'b']
"""
if all :
result = set()
for cluster in self :
result.update(cluster.nodes())
return result
else :
return set(self._nodes)
def children (self) :
"""
>>> Cluster(['a', 'b'],
... [Cluster(['1', '2'],
... [Cluster(['A'])]),
... Cluster(['3', '4', '5'],
... [Cluster(['C', 'D'])])]).children()
(Cluster(['...', '...'],
[Cluster(['A'], [])]),
Cluster(['...', '...', '...'],
[Cluster(['...', '...'], [])]))
"""
return tuple(self._children)
def __contains__ (self, name) :
"""
>>> c = Cluster(['a', 'b'],
... [Cluster(['1', '2'],
... [Cluster(['A'])]),
... Cluster(['3', '4', '5'],
... [Cluster(['C', 'D'])])])
>>> 'a' in c
True
>>> 'x' in c
False
>>> '4' in c
True
"""
if name in self._nodes :
return True
for child in self._children :
if name in child :
return True
return False
def __iter__ (self) :
"""
>>> c = Cluster(['a', 'b'],
... [Cluster(['1', '2'],
... [Cluster(['A'])]),
... Cluster(['3', '4', '5'],
... [Cluster(['C', 'D'])])])
>>> for cluster in c :
... print(list(sorted(cluster.nodes())))
['a', 'b']
['1', '2']
['A']
['3', '4', '5']
['C', 'D']
"""
yield self
for child in self._children :
for item in child :
yield item
@snakes.plugins.plugin("snakes.nets")
def extend (module) :
class PetriNet (module.PetriNet) :
def __init__ (self, name, **options) :
module.PetriNet.__init__(self, name, **options)
self.clusters = Cluster()
def copy (self, name=None, **options) :
result = module.PetriNet.copy(self, name, **options)
result.clusters = self.clusters.copy()
return result
def __pnmldump__ (self) :
result = module.PetriNet.__pnmldump__(self)
result.add_child(Tree.from_obj(self.clusters))
return result
@classmethod
def __pnmlload__ (cls, tree) :
result = new_instance(cls, module.PetriNet.__pnmlload__(tree))
result.clusters = tree.child(Cluster.__pnmltag__).to_obj()
return result
def add_place (self, place, **options) :
path = options.pop("cluster", None)
module.PetriNet.add_place(self, place, **options)
self.clusters.add_node(place.name, path)
def remove_place (self, name, **options) :
module.PetriNet.remove_place(self, name, **options)
self.clusters.remove_node(name)
def add_transition (self, trans, **options) :
path = options.pop("cluster", None)
module.PetriNet.add_transition(self, trans, **options)
self.clusters.add_node(trans.name, path)
def remove_transition (self, name, **options) :
module.PetriNet.remove_transition(self, name, **options)
self.clusters.remove_node(name)
def rename_node (self, old, new, **options) :
module.PetriNet.rename_node(self, old, new, **options)
self.clusters.rename_node(old, new)
return PetriNet, Cluster