On Wed, Nov 7, 2012 at 1:43 PM, Julien Derr <[email protected]> wrote:
> Hi everyone, > I am using constrain in a syntax like > c.constrain(1., where=facesOutside) > > If I want to release the constrain, Is it possible? how can I do this ? > Hi Julien, Yes this is possible. There is a method of the Variable class called "release". All this does is remove the constraint from the variables list of constraints. One issue in the case above it getting a handle on the actual constraint. You'll need to use the "faceConstraints" list to do this. The following will probably deal with your issue. > import fipy as fp > m = fp.Grid1D() > v = fp.CellVariable(mesh=m) > v.constrain(1., where=m.facesLeft) > print v.faceValue [ 1. 0.] > v.release(v.faceConstraints[0]) > print v.faceValue [ 0. 0.] It might be better if "constrain" returned a reference to the actual constraint rather than using the "faceConstraints" attribute to get the reference, but at least for now it works as described above. Cheers -- Daniel Wheeler
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