Greetings! I'm having trouble using records. I'm not sure whether to
report this as a bug, but it certainly isn't a feature! I would like to be
able to iterate over the individual rows in a record array, like so:
>>> import numpy.core.records as rec
>>> x=rec.array([[1,1.1,'1.0'],[2,2.2,'2.0']],
formats='i4,f8,a4',names=['i','f','s'])
>>> type(x[0])
<class 'numpy.core.records.record'>
>>> x[0].tolist()
Traceback (most recent call last):
File "<stdin>", line 1, in ?
ValueError: can't convert a 0-d array to a list
>>> [i for i in x[0]]
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: iteration over non-sequence
Am I going about this wrong? I would think I should be able to loop over an
individual row in a record array, or turn it into a list. For the latter, I
wrote my own thing, but tolist() should work by itself. Note that in
rec2list, I need to use range(len(line)) because the list comprehension
doesn't work correctly:
def rec2list(line):
"""Turns a single element record array into a list."""
return [line[i] for i in xrange(len(line))]
#...
I will file a bug, unless someone tells me I'm going about this the wrong way.
Thanks for your help
John
--
*************************
John Parejko
Department of Physics and Astronomy
Drexel University
Philadelphia, PA
**************************
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