def _OperatorVariableClass(self, baseClass=None):
"""
>>> from fipy.meshes import Grid1D
>>> a = CellVariable(mesh=Grid1D(nx=1), value=1)
>>> c = -a
>>> b = c.old + 3
>>> print(b)
[2]
>>> from builtins import str
>>> print(str(b.getsctype()) == str(numerix.NUMERIX.obj2sctype(numerix.array(1))))
True
replacing with the same thing is no problem
>>> a.value = (3)
>>> b = c.old + 3
>>> print(b)
[0]
replacing with multiple copies causes the reference counting problem
>>> a.value = (3)
>>> b = (c + c).old + 3
>>> print(b)
[-3]
the order matters
>>> b = (c + c).old + 3
>>> a.value = (2)
>>> print(b)
[-1]
"""
baseClass = _MeshVariable._OperatorVariableClass(self,
baseClass=baseClass)
class _CellOperatorVariable(baseClass):
@property
def old(self):
if self._old is None:
oldVar = []
for v in self.var:
if hasattr(v, "old"):
oldVar.append(v.old)
else:
oldVar.append(v)
self._old = self.__class__(op=self.op,
var=oldVar,
opShape=self.opShape,
canInline=self.canInline)
return self._old
return _CellOperatorVariable
def _OperatorVariableClass(self, baseClass=None):
"""
>>> from fipy.meshes import Grid1D
>>> a = CellVariable(mesh=Grid1D(nx=1), value=1)
>>> c = -a
>>> b = c.old + 3
>>> print(b)
[2]
>>> from builtins import str
>>> print(str(b.getsctype()) == str(numerix.NUMERIX.obj2sctype(numerix.array(1))))
True
replacing with the same thing is no problem
>>> a.value = (3)
>>> b = c.old + 3
>>> print(b)
[0]
replacing with multiple copies causes the reference counting problem
>>> a.value = (3)
>>> b = (c + c).old + 3
>>> print(b)
[-3]
the order matters
>>> b = (c + c).old + 3
>>> a.value = (2)
>>> print(b)
[-1]
"""
baseClass = _MeshVariable._OperatorVariableClass(self,
baseClass=baseClass)
class _CellOperatorVariable(baseClass):
@property
def old(self):
if self._old is None:
oldVar = []
for v in self.var:
if hasattr(v, "old"):
oldVar.append(v.old)
else:
oldVar.append(v)
self._old = self.__class__(op=self.op, var=oldVar,
opShape=self.opShape,
canInline=self.canInline)
return self._old
return _CellOperatorVariable