[Numpy-discussion] numpy.fromiter hiding exceptions

Åsmund Hjulstad asmund.hjulstad@gmail....
Fri Feb 18 03:20:26 CST 2011


Hi all,

I am finding it hard to debug cases where I am creating numpy arrays from
generators, and the generator function throws an exception. It seems that
numpy just swallows the exception, and what I get is a not too helpful

ValueError: iterator too short

Much more helpfull would be to see the original exception, and get the
stacktrace in ipython (or wherever I am working).

Is this possible in some easy way, or am I stuck with the equivalent of

if debug:
   mygenerator = list(mygenerator)
a = np.fromiter(iter(mygenerator), dtype=xxx, count=xxx)

-- 
Åsmund Hjulstad, asmund@hjulstad.com
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