Commit 5790e28d authored by Michael Kuron's avatar Michael Kuron
Browse files

Fix FiniteDifferenceStaggeredStencilDerivation on Sympy 1.1

parent ed864c0e
......@@ -306,7 +306,7 @@ class FiniteDifferenceStaggeredStencilDerivation:
center = [tuple(p + pos) for p in points].index((0, 0, 0)[:dim])
best = [b for b in best if b[center] != 0]
if len(best) > 1: # if there are still multiple, they are equivalent, so we average
weights = sp.Add(*[sp.Matrix(b) for b in best]) / len(best)
weights = [sum([b[i] for b in best]) / len(best) for i in range(len(weights))]
weights = best[0]
assert weights
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