On Monday 07 November 2005 20:21, Robert Kern wrote: > James Stroud wrote: > > Hello All, > > > > How does one make an arbitrary class (e.g. class myclass(object)) behave > > like a list in method calls with the "*something" operator? What I mean > > is: > > > > myobj = myclass() > > > > doit(*myobj) > > > > I've looked at getitem, getslice, and iter. What is it if not one of > > these? > > > > And, how about the "**something" operator? > > Avoiding magic at the expense of terseness, I would do something like > the following: > > class myclass(object): > def totuple(self): > ... > def todict(self): > ... > > myargs = myclass() > mykwds = myclass() > > doit(*myargs.totuple(), **mykwds.todict())
Actually, I retried __iter__ and it worked. I'm not sure how I screwed it up before. So I'm happy to report a little "magic": py> def doit(*args): ... print args ... py> class bob: ... def __init__(self, length): ... self.length = length ... def __iter__(self): ... return iter(xrange(self.length)) ... py> b = bob(8) py> list(b) [0, 1, 2, 3, 4, 5, 6, 7] py> doit(*b) (0, 1, 2, 3, 4, 5, 6, 7) -- James Stroud UCLA-DOE Institute for Genomics and Proteomics Box 951570 Los Angeles, CA 90095 http://www.jamesstroud.com/ -- http://mail.python.org/mailman/listinfo/python-list
