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unaryOperatorVariable.py
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unaryOperatorVariable.py
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## -*-Pyth-*-
# #############################################################################
# FiPy - a finite volume PDE solver in Python
#
# FILE: "unaryOperatorVariable.py"
#
# Author: Jonathan Guyer <guyer@nist.gov>
# Author: Daniel Wheeler <daniel.wheeler@nist.gov>
# Author: James Warren <jwarren@nist.gov>
# mail: NIST
# www: <http://www.ctcms.nist.gov/fipy/>
#
# ========================================================================
# This software was developed at the National Institute of Standards
# and Technology by employees of the Federal Government in the course
# of their official duties. Pursuant to title 17 Section 105 of the
# United States Code this software is not subject to copyright
# protection and is in the public domain. FiPy is an experimental
# system. NIST assumes no responsibility whatsoever for its use by
# other parties, and makes no guarantees, expressed or implied, about
# its quality, reliability, or any other characteristic. We would
# appreciate acknowledgement if the software is used.
#
# This software can be redistributed and/or modified freely
# provided that any derivative works bear some notice that they are
# derived from it, and any modified versions bear some notice that
# they have been modified.
# ========================================================================
#
# #############################################################################
##
__docformat__ = 'restructuredtext'
__all__ = []
def _UnaryOperatorVariable(operatorClass=None):
"""
Test BinOp pickling
>>> from fipy import Grid1D, FaceVariable, CellVariable, dump, Variable
>>> import os, sys
>>> m = Grid1D()
>>> vs = (CellVariable(mesh=m, value=2.), FaceVariable(mesh=m, value=3.), Variable(4))
>>> tmp = []
>>> for v in vs:
... (f, n) = dump.write(-v)
... tmp += [dump.read(n)]
... if f is not None:
... os.close(f)
... os.remove(n)
>>> for v in tmp:
... print v.__class__
<class 'fipy.variables.cellVariable.CellVariable'>
<class 'fipy.variables.faceVariable.FaceVariable'>
<class 'fipy.variables.variable.Variable'>
>>> print tmp[0].allclose(-2.)
True
>>> print tmp[1].allclose(-3.)
True
>>> print tmp[2].allclose(-4.)
True
"""
class unOp(operatorClass):
def _calcValue_(self):
return self.op(self.var[0].value)
@property
def unit(self):
assert(hasattr(self, "_unit") == True)
if self._unit is None:
try:
return self._extractUnit(self.op(self.var[0]._unitAsOne))
except:
return self._extractUnit(self._calcValue())
else:
return self._unit
return unOp
def _test():
import fipy.tests.doctestPlus
return fipy.tests.doctestPlus.testmod()
if __name__ == "__main__":
_test()