/usr/share/pyshared/openopt/solvers/Standalone/bvls_oo.py is in python-openopt 0.34+svn1146-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | from numpy.linalg import norm
from numpy import dot, asfarray, atleast_1d, zeros, ones, int, float64, where, inf
from openopt.kernel.baseSolver import baseSolver
try:
import bvls as BVLS
except:
from openopt.kernel.oologfcn import OpenOptException
raise OpenOptException('You should have bvls.f compiled via f2py, see OO LLSP doc webpage for details')
class bvls(baseSolver):
__name__ = 'bvls'
__license__ = "BSD"
__authors__ = 'Robert L. Parker rlparker[at]ucsd.edu, Philip B. Stark stark[at]stat.berkeley.edu'
__alg__ = '"Bounded Variable Least Squares: An Algorithm and Applications" by P.B. Stark and R.L. Parker, in the journal "Computational Statistics", vol.10(2), 1995'
__info__ = 'requires manual compilation of bvls.f by f2py, see OO online doc for details'
__optionalDataThatCanBeHandled__ = ['lb', 'ub']
__bvls_inf__ = 1e100
T = float64
def __init__(self): pass
def __solver__(self, p):
key = 0
T = self.T
istate = zeros(p.n+1, int)
m, n = p.C.shape[0], p.n
zz = zeros(m, T)
act = zeros((m, m+2), T)
a, b = T(p.C), T(p.d)
bl, bu = p.lb.copy(), p.ub.copy()
bl[where(bl==-inf)[0]] = -self.__bvls_inf__
bu[where(bu==inf)[0]] = self.__bvls_inf__
xf, w, istop, msg, iter = BVLS.bvls(key, a, b, bl, bu, p.maxIter, act, zz, istate)
p.istop, p.msg, p.iter = istop, msg.rstrip(), iter
p.xf = xf
#p.ff = p.fk = w[0]
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