Jonathan Slenders schrieb am 08.05.2015 um 14:16:
What will happen to array.array('u') in Python 4? It is deprecated right now. I remember reading about mutable strings somewhere, but I forgot, and I can't find the discussion.
In any case, I need to have a mutable character array, for efficient manipulations. (Not a byte array.) And I need to be able to use the "re" module to search through it. array.array('u') works great in Python 3.
Well, for some value of "great" and "works". The problems are that 1) 'u' has a platform dependent size of 16 or 32 bits and 2) it does not match the internal representation of unicode strings. It will thus use surrogate pairs on some platforms and not on others, and converting between Unicode strings and arrays requires an encoding/decoding step. And it also does not seem like the "re" module currently supports searching in unicode arrays (everything else would have been very surprising).
ISTM that your best bet is currently to look for a suitable module on PyPI that implements mutable character arrays. I'm sure you're not the only one who needs something like that. The usual suspect would be NumPy, but there may be smaller and simpler tools available.