python - Conversion from U3 dtype to ascii -

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i reading data .mat file. data in form on numpy array.

[array([u'abt'], dtype='<u3')]

this 1 element of array. want value 'abt' array. unicode normalize , encode ascii functions not work.

encode string method, can't work directly on array of strings. there several ways of applying each string

here i'm working py3, default unicode.

in [179]: a=np.array(['one','two']) in [180]: out[180]:  array(['one', 'two'],        dtype='<u3')

plain iteration:

in [181]: np.array([s.encode() s in a]) out[181]:  array([b'one', b'two'],        dtype='|s3')

np.char has functions apply string methods each element of array:

in [182]: np.char.encode(a) out[182]:  array([b'one', b'two'],        dtype='|s3')

but looks 1 of conversions astype can handle:

in [183]: a.astype('<s3') out[183]:  array([b'one', b'two'],        dtype='|s3')

and inspired recent question np.chararray: what happened numpy.chararray

in [191]: ac=np.char.array(a) in [192]: ac out[192]:  chararray(['one', 'two'],        dtype='<u3') in [193]: ac.encode() out[193]:  array([b'one', b'two'],        dtype='|s3')

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