[Numpy-discussion] How to distinguish between number and string dypes

[Vincent Davis]

On Thu, May 27, 2010 at 8:39 AM, Keith Goodman <kwgoodman at gmail.com> wrote:

> To see if it is a number could you use something like:
>
> np.issubdtype(a.dtype, float) or np.issubdtype(a.dtype, int) or
> np.issubdtype(a.dtype, complex)
>
> And for string:
>
> np.issubdtype(a.dtype, str)
>

These are valid but what I don't like is that I need to know the list of
possible number types. Basically I don't like a test that fails because I
didn't know about a dtype. For string It is ok, the universe of is either
string or not string. Maybe this is as good as it gets.

I guess my use case is that I want to be sure I can perform math on the
values. So maybe I should just do someting like
"numpy.lib._iotools._is_string_like"
but "_is_number_like", Maybe there is such and I missed it. If not there
should be.

Vincent



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