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bitten: update bitten.py

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This commit is contained in:
Connor Olding 2022-06-13 22:02:45 +02:00
parent cb2a800044
commit 6c256510d6
1 changed files with 27 additions and 2 deletions
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29
bitten/bitten.py
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@ -156,6 +156,20 @@ def _penalize2(constraints, *x, tol=1e-5, scale=1e10, growth=3.0):
return scale * (unsat + penalsum)
def _penalize3(constraints, *x, tol=1e-5, scale=1e10, growth=3.0):
# updated from upstream (v2022.19)
penalties = _flatten(cons(*x) for cons in constraints)
n_con = len(penalties)
growth = growth ** (1.0 / n_con) # "ps"
increment = 1.0 / np.sqrt(n_con) # "pnsi"
penalty, nominal = 0.0, 0.0 # "pns", "pnsm"
for p in penalties:
p = max(p - tol, 0.0)
penalty = penalty * growth + increment + p + p * p * p
nominal = nominal * growth + increment
return scale * (penalty - nominal + 1.0)
def penalize(x, constraints, tol=1e-5, *, scale=1e10, growth=4.0):
# DEPRECATED
return _penalize(constraints, x, tol=tol, scale=scale, growth=growth)
@ -266,14 +280,25 @@ class Crossentropy(AbstractError):
class Constrain(Objective):
def __init__(self, *constraints, tol=1e-5):
def __init__(self, *constraints, tol=1e-5, version=1):
for cons in constraints:
assert callable(cons)
self.constraints = constraints
self.tol = float(tol)
self.version = version
@property
def version(self):
return self._version + 1
@version.setter
def version(self, version):
assert 1 <= version <= 3, version
self._version = version - 1
self._penalize = [_penalize, _penalize2, _penalize3][self._version]
def penalize(self, *args):
return _penalize(self.constraints, *args, tol=self.tol)
return self._penalize(self.constraints, *args, tol=self.tol)
def compute_with(self, fun, **kw_hypers):
return self.penalize(*kw_hypers.values())