Hi, I'm having trouble with creating np.string_ fields in recarrays. If I create a recarray using
np.rec.fromrecords([(1,'hello'),(2,'world')],names=['a','b']) the result looks fine: rec.array([(1, 'hello'), (2, 'world')], dtype=[('a', '<i8'), ('b', '| S5')]) But if I want to specify the data types: np.rec.fromrecords([(1,'hello'),(2,'world')],dtype=[('a',np.int8), ('b',np.str)]) the string field is set to a length of zero: rec.array([(1, ''), (2, '')], dtype=[('a', '|i1'), ('b', '|S0')]) I need to specify datatypes for all numerical types since I care about int8/16/32, etc, but I would like to benefit from the auto string length detection that works if I don't specify datatypes. I tried replacing np.str by None but no luck. I know I can specify '|S5' for example, but I don't know in advance what the string length should be set to. Is there a way to solve this problem without manually examining the data that is being passed to rec.fromrecords? Thanks for any help, Thomas _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion