[PYTHON MATRIX-SIG] Type coercion two more times
Fri, 26 Jan 96 11:35:47 EST
From: firstname.lastname@example.org (Hinsen Konrad)
Ok, I'm starting to be convinced. My last hurdle to saying yes is
having to explain the following to potential Python array users:
>>> pi = omath.arctan(1.0)*4.0
>>> m = Array_f([1.0,2.0,3.0])
>>> m * pi
Traceback (innermost last):
File "<stdin>", line 1, in ?
TypeError: inconsistant floating point types
It could be made a bit easier by changing the text of the
TypeError: no automatic coercion between precisions
Yet I agree, this is not a desirable feature. It is just the most
acceptable among the evils we have to choose from.
An important thing to remember here is that a naive user should never
write m = array([1.0,2.0,3.0], 'f') (the new syntax). They should
just write m = array([1.0,2.0,3.0]) which will produce an array of
doubles and should allow everybody to live happily ever after.
Not that I particularly like the type error either...
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