def __init__(self,
filenames,
factors,
maxdistances,
twoway,
impedances=None,
flatten_nodeids=False):
if not filenames: return
from pyaccess.pyaccess import PyAccess
self.pya = PyAccess()
self.pya.createGraphs(len(filenames))
if impedances is None: impedances = [None] * len(filenames)
self.nodeids = []
self.external_nodeids = []
for num,filename,factor,maxdistance,twoway,impedance in \
zip(range(len(filenames)),filenames,factors,maxdistances,twoway,impedances):
net = cPickle.load(open(filename))
if impedance is None: impedance = "net['edgeweights']"
impedance = eval(impedance)
self.pya.createGraph(num,
net['nodeids'],
net['nodes'],
net['edges'],
impedance * factor,
twoway=twoway)
if len(filenames) == 1 and flatten_nodeids:
self.nodeids = net['nodeids']
else:
self.nodeids += zip(
[num] * len(net['nodeids']),
range(len(net['nodeids']))) # these are the internal ids
self.external_nodeids.append(net['nodeids'])
self.pya.precomputeRange(maxdistance, num)
