So this is probably a numexpr issue. There doesn't seem to be an isnan()
implementation [1]. I would bring it up with them. Sorry we can't do more.
Be Well
Anthony
1. http://code.google.com/p/numexpr/wiki/UsersGuide
On Thu, Aug 16, 2012 at 12:57 PM, Aquil H. Abdullah <
aquil.abdul...@gmail.com> wrote:
> I get the same error if I use:
>
> bad_vols = tbl.getWhereList('volume == nan')
> bad_vols = tbl.getWhereList('volume == NaN')
>
> --
> Aquil H. Abdullah
> "I never think of the future. It comes soon enough" - Albert Einstein
>
> On Thursday, August 16, 2012 at 1:52 PM, Anthony Scopatz wrote:
>
> Have you tried simply doing:
>
> 'volume == nan' or
> 'volume == NaN'
>
> On Thu, Aug 16, 2012 at 12:49 PM, Aquil H. Abdullah <
> aquil.abdul...@gmail.com> wrote:
>
> Hello All,
>
> I am trying to determine if there are any NaN values in one of my tables,
> but when I queried for numpy.nan I received a NameError. Can any tell be
> the best way to search for a NaN value? Thanks!
>
> In [7]: type(np.nan)
> Out[7]: float
>
> In [8]: bad_vols = tbl.getWhereList('volume == %f' % np.nan)
> ---------------------------------------------------------------------------
> NameError Traceback (most recent call last)
> /Users/aquilabdullah/<ipython-input-8-2c1b183b0581> in <module>()
> ----> 1 bad_vols = tbl.getWhereList('volume == %f' % np.nan)
>
> /Library/Python/2.7/site-packages/tables/table.pyc in getWhereList(self,
> condition, condvars, sort, start, stop, step)
> 1540
> 1541 coords = [ p.nrow for p in
> -> 1542 self._where(condition, condvars, start, stop,
> step) ]
> 1543 coords = numpy.array(coords, dtype=SizeType)
> 1544 # Reset the conditions
>
> /Library/Python/2.7/site-packages/tables/table.pyc in _where(self,
> condition, condvars, start, stop, step)
> 1434
> 1435 # Compile the condition and extract usable index
> conditions.
> -> 1436 condvars = self._requiredExprVars(condition, condvars,
> depth=3)
> 1437 compiled = self._compileCondition(condition, condvars)
> 1438
>
> /Library/Python/2.7/site-packages/tables/table.pyc in
> _requiredExprVars(self, expression, uservars, depth)
> 1207 val = user_globals[var]
> 1208 else:
> -> 1209 raise NameError("name ``%s`` is not defined" % var)
> 1210
> 1211 # Check the value.
>
> NameError: name ``nan`` is not defined
>
> --
> Aquil H. Abdullah
> "I never think of the future. It comes soon enough" - Albert Einstein
>
>
>
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