[Python-Dev] Python equivalents in stdlib Was: Include datetime.py in stdlib or not? (original) (raw)

Michael Foord fuzzyman at voidspace.org.uk
Wed Jul 7 17:39:38 CEST 2010

On 07/07/2010 16:29, Alexander Belopolsky wrote:

[snip...]

4. Does not ctypes make it possible to replace a method of a Python-coded class with a faster C version, with something like try: connect to methods.dll check that function xyx exists replace Someclass.xyy with ctypes wrapper except: pass For instance, the SequenceMatcher heuristic was added to speedup the matching process that I believe is encapsulated in one O(n**2) or so bottleneck method. I believe most everything else is O(n) bookkeeping.

The ctypes modules is very CPython centric as far as I know. For the new modules, this may be a valid way to rapidly develop accelerated versions. For modules that are already written in C, I don't see much benefit in replacing them with ctypes wrappers.

Nope, both IronPython and PyPy have ctypes implementations and Jython is in the process of "growing" one. Using ctypes for C extensions is the most portable way of providing C extensions for Python (other than providing a pure-Python implementation of course).

Michael

-- http://www.ironpythoninaction.com/ http://www.voidspace.org.uk/blog

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