Hi! Russ wrote: > I tried the following: > > >>> x = complex(4) > >>> y = x > >>> y *= 2 > >>> print x, y > (4+0j) (8+0j) > > But when I tried the same thing with my own class in place of > "complex" above, I found that both x and y were doubled. I'd like to > make my class behave like the "complex" class. Can someone tell me the > trick? Also, where can I find the code for for the "complex" class? I > hope it's written in Python! Thanks.
In CPython it is actually written in C, implemented in the Objects/complexobject.c file. See for example: http://svn.python.org/view/python/trunk/Objects/complexobject.c?rev=42596&view=markup In PyPy it is indeed a pure Python implementation right now: http://codespeak.net/svn/pypy/dist/pypy/module/__builtin__/app_complex.py Cheers, Carl Friedrich Bolz -- http://mail.python.org/mailman/listinfo/python-list
