I think I found a bug in dumps for matrices over GF(2). The problem surfaced
when I tried to save a set of such matrices, and the load failed complaining
that
TypeError('mutable matrices are unhashable',)
Simple example demonstrates the problem:
z = zero_matrix(GF(2), 3)
z.set_immutable()
print z.is_immutable()
zstr = z.dumps()
z2 = loads(zstr)
print z2.is_immutable()
which (i think) causes an exception in this code:
s = set()
s.add(z)
sstr = dumps(s)
s2 = loads(sstr)
Cheers,
Matthew
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