Andrew Kuchling wrote: > > >The codec design allows extending the constructors using keyword > >arguments, however I'd rather not add a generic **kws argument > >to the base classes since this would hide errors (unknown or > >unsupported keywords, mispellings, etc.). > > Isn't such an argument required at least for StreamReaderWriter, > because it actually instantiates two objects? > > class StreamReaderWriter: > def __init__(self, stream, Reader, Writer, errors='strict'): > > """ ... > Reader, Writer must be factory functions or classes > providing the StreamReader, StreamWriter interface resp. > """ > self.stream = stream > self.reader = Reader(stream, errors) > self.writer = Writer(stream, errors) > > Hmm... you'd better not need to have two different set of keyword > arguments for Reader and Writer. Is that limitation acceptable? Should be OK since both work on the same stream backend and thus will normally use the same encoding parameters. > If > it is, then the list of changes becomes 1) add **kw to codecs.open, > and 2) add **kw to StreamReaderWriter's constructor, and apply it to > the Reader() and Writer() calls. Right. > >The encoder and decoder functions must work stateless. > > OK, then they're not suitable for encryption (in general, though > they'd work fine for ECB mode). Right; would it be feasable to use ECB ciphers for the stateless part and also allow other modes for the StreamReader/Writer ? -- Marc-Andre Lemburg CEO eGenix.com Software GmbH ______________________________________________________________________ Consulting & Company: http://www.egenix.com/ Python Software: http://www.lemburg.com/python/
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