/usr/share/pyshared/openopt/solvers/scipy_optim/scipy_powell_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 33 | from scipy.optimize import fmin_powell
from openopt.kernel.baseSolver import baseSolver
from openopt.kernel.ooMisc import isSolved
class scipy_powell(baseSolver):
__name__ = 'scipy_powell'
__license__ = "BSD"
#__authors__ =
__alg__ = ""
__info__ = 'unconstrained NLP solver, cannot handle user-supplied gradient'
iterfcnConnected = True
def __init__(self):pass
def __solver__(self, p):
def iterfcn(x):
p.xk, p.fk = x, p.f(x)
p.iterfcn()
iter = p.iter - 1
if p.istop: raise isSolved
try:
iterfcn(p.x0)
xf = fmin_powell(p.f, p.x0, xtol=p.xtol, ftol = p.ftol, disp = 0, maxiter=p.maxIter, maxfun = p.maxFunEvals, callback=iterfcn)
except isSolved:
xf = p.xk
ff = p.f(p.xk)
p.xk = p.xf = xf
p.fk = p.ff = ff
p.istop = 1000
p.iterfcn()
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