> it would appear that that the call to kernel() in right_kernel() uses
> the version of kernel() defined for dense rational matrices (as
> perhaps it should), and not the modified version of left_kernel()
> nearby (as the code locally might suggest one to expect).
The issue is with the kernel = left_kernel line in the subclass. This
is a known... "feature"... of Python.
If you have:
class A:
def foo():
return "A"
bar = foo
class B(A):
def foo():
return "B"
Then B().foo() will return "B" but B().bar() will return "A". The bar
= foo line is "early binding" -- it doesn't do what you expect with
respect to inheritance.
The solution? def kernel(...): return left_kernel(...). Shitty, but
that's Python for you.
Nick
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