I think the gist of your problem is that you are re-binding self in the method. Here is a simpler example of your problem:
py> def doit(c): ... c = 5 ... print "c in the method is", c ... py> c = 42 py> print "c before calling the method is", c c before calling the method is 42 py> doit(c) c in the method is 5 py> print "c after calling the method is", c c after calling the method is 42 James On Saturday 24 September 2005 08:36, Gerard Flanagan wrote: > Hello > > I'm pretty new to Python and was wondering why the 'Square' method in > the following code doesn't work. It doesn't fail, just doesn't do > anything ( at least, not what I'd like! ). Why doesn't 'A.a' equal 2 > after squaring? > TIA. > > > class FibonacciMatrix: > def __init__( self ): > self.a = 1 > self.b = 1 > self.c = 0 > > def __mul__( self, other ): > result = FibonacciMatrix() > result.a = self.a * other.a + self.b * other.b > result.b = self.a * other.b + self.b * other.c > result.c = self.b * other.b + self.c * other.c > return result > > def Square( self ): > self *= self > > > A = FibonacciMatrix() > A.Square() > > print A.a #prints '1' > > A = FibonacciMatrix() > B = A * A > > print B.a #prints '2' > > ------------------------------ -- 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
