Author nikratio
Recipients nikratio
Date 2014-03-25.04:14:29
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <1395720869.89.0.455515257207.issue21057@psf.upfronthosting.co.za>
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Content
In Python 3.4, TextIOWrapper can not read from streams that return bytearrays or memoryviews:

from io import TextIOWrapper, BytesIO
class MyByteStream(BytesIO):
    def read1(self, len_):
        return memoryview(super().read(len_))
bs = MyByteStream(b'some data in ascii\n')
ss = TextIOWrapper(bs, encoding='ascii')
print(ss.read(200))

results in:

TypeError: underlying read1() should have returned a bytes object, not 'memoryview'

I don't think there's any good reason for TextIOWrapper not accepting any bytes-like object (especially now that b''.join finally accepts bytes-like objects as well).
History
Date User Action Args
2014-03-25 04:14:29nikratiosetrecipients: + nikratio
2014-03-25 04:14:29nikratiosetmessageid: <1395720869.89.0.455515257207.issue21057@psf.upfronthosting.co.za>
2014-03-25 04:14:29nikratiolinkissue21057 messages
2014-03-25 04:14:29nikratiocreate