[EMAIL PROTECTED] wrote: > On Apr 4, 4:55 pm, "Terry Reedy" <[EMAIL PROTECTED]> wrote: >> "Ziga Seilnacht" <[EMAIL PROTECTED]> wrote in message >> >> news:[EMAIL PROTECTED] >> | This looks like a bug in Python. It works for all the other >> | operators: > [SNIP] >> | >>> i ** 3 >> | 74088 >> | >> | You should submit a bug report to the bug tracker: >> | >> |http://sourceforge.net/bugs/?group_id=5470 >> >> Nice test. I thought maybe __pow__ might be different in not having a >> reverse form, but indeed, int has an __rpow__ method. >> >> Before submitting, make sure that this does not work in 2.5, and then say >> so in the bug report. In fact, copy the version/system info that the >> interactive interpreter puts up when it starts. > > FWIW: > Python 2.5 (r25:51908, Jan 21 2007, 03:10:25) > [GCC 3.4.6 20060404 (Red Hat 3.4.6-3)] on HOSTNAME_REDACTED > Type "help", "copyright", "credits" or "license" for more information. >>>> class MyInt(int): > ... __pow__ = int.__add__ > ... >>>> i=MyInt(42) >>>> i**3 > 74088 > Interestingly, Jython doesn't suffer from this drawback, which I suspect is due to special-casing of the __pow__ operator that was discussed quite recently on python-dev without anybody noticing this aspect of things.
C:\jython2.2b1>jython [...] >>> class S(int): ... pass ... >>> S.__pow__ = S.__add__ >>> s = S(12) >>> s ** 2 14 >>> Note that it still doesn't work to override the *instance's* method. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Recent Ramblings http://holdenweb.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
