/usr/share/pyshared/openopt/solvers/scipy_optim/scipy_bfgs_oo.py is in python-openopt 0.38+svn1589-1.
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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 | from scipy.optimize import fmin_bfgs
from openopt.kernel.ooMisc import isSolved
from openopt.kernel.baseSolver import baseSolver
class scipy_bfgs(baseSolver):
__name__ = 'scipy_bfgs'
__license__ = "BSD"
#__authors__ =
__alg__ = "BFGS"
__info__ = 'unconstrained NLP solver'
iterfcnConnected = True
def __init__(self):pass
def __solver__(self, p):
def iterfcn(x):
p.xk, p.fk = x, p.f(x)
p.iterfcn()
if p.istop: raise isSolved
# try:
#p.iterfcn(p.x0)
p.xk = p.xf = fmin_bfgs(p.f, p.x0, fprime=p.df, disp = 0, gtol=p.gtol, maxiter=p.maxIter, callback=iterfcn)
p.istop = 1000
# except isSolved:
# xf = p.xk
#
# ff = p.f(xf)
# p.xk = p.xf = xf
# p.fk = p.ff = ff
# p.istop = 1000
# p.iterfcn()
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