[Numpy-discussion] comparing string array with None raises ValueError
rlw at stsci.edu
Thu Jun 24 11:54:05 CDT 2004
On 24 Jun 2004, Todd Miller wrote:
> OK, I see your point. I talked it over with Perry and he made a
> reasonable case for allowing comparisons with None (or any object).
> Perry argued that since None is a common default parameter value, it
> might simplify code to not have to add logic to handle that case.
> If no one objects, I'll change numarray.strings so that comparison of a
> string array with any object not convertible to a string array results
> in an array of False values.
> Any objections?
Hmm, before you do that you might look at this:
>>> import numarray
>>> b = numarray.zeros(10)
array([1, 1, 1, 1, 1, 1, 1, 1, 1, 1], type=Bool)
So comparing numeric arrays to None returns a scalar false value since
the variable b is not None.
I figure that the behavior of comparisons to None for string arrays and
numeric arrays ought to be consistent. I don't know which is
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