[Python-Dev] PyUnicode_Resize

Victor Stinner victor.stinner at haypocalc.com
Tue Nov 22 02:08:17 CET 2011


In Python 3.2, PyUnicode_Resize() expects a number of Py_UNICODE units, 
whereas Python 3.3 expects a number of characters.

It is tricky to convert a number of Py_UNICODE units to a number of 
characters, so it is diffcult to provide a backward compatibility 
PyUnicode_Resize() function taking a number of Py_UNICODE units in Python 3.3.

Should we rename PyUnicode_Resize() in Python 3.3 to avoid surprising bugs?

The issue only concerns Windows with non-BMP characters, so a very rare use 

The easiest solution is to do nothing in Python 3.3: the API changed, but it 
doesn't really matter. Developers just have to be careful on this particular 
issue (which is not well documented today).


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