"Gerard Flanagan" <[EMAIL PROTECTED]> writes:
[...]
> class FibonacciMatrix:
[...]
> def Copy( self ):
[...]
__copy__ would be a more standard name. Then:
import copy
fm = FibonacciMatrix()
fm2 = copy.copy(fm)
I suppose you could also add:
__deepcopy__ = __copy__
in the body of the clas
Thanks for all the replies - you are very nice people!
Don't worry Jeff, I assumed you weren't telling me what 1*1 equals! I
got your point.
James Stroud impressively got to the heart of what I was trying to do -
which was just to wrap up the code here:
en.wikipedia.org/wiki/Fibonacci_number_pr
> James Stroud <[EMAIL PROTECTED]> (JS) wrote:
>JS> def Multiply(self, other):
>JS> self.a = self.a * other.a + self.b * other.b
>JS> self.b = self.a * other.b + self.b * other.c
>JS> self.c = self.b * other.b + self.c * other.c
I gues this will give the wrong
Oops!
I should have used '2' in the example, or some other number.
I was trying to make a point about what
x *= ...
means when it is in the context of a function (or method) body.
I think this is key to understanding what Python did in the case the user
posted.
Being rude wasn't my inte
On Saturday 24 September 2005 09:07, [EMAIL PROTECTED] wrote:
> For the same reason that
> def f(z):
> z *= z
> c = 1
> f(c)
> print c
> prints 1.
>
> Jeff
I don't mean to be rude, but this is a horrible example if your are intending
to help a neophyte:
py>
Shoot, Square() should be:
def Square(self):
self.Multiply(self)
Forgot to proofread before hitting send.
James
--
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
As others have pointed out, you are just reassigning a new value to the
self argument in the Square() method shown. Instead, what you need to
do is change the object that 'self' refers to within the method. To do
this, change it to:
def Square( self ):
result = self * self
self
Additionally, your __mul__() returns a new FibonnacciMatrix. You do not want a
new FibbonacciMatrix, you want to operate on an existing matrix (otherwise,
you would want to go with Ivan Voras's solution, where you re-assign outside
of the class). If you don't want the overhead of creating a inst
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
"Gerard Flanagan" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
>def __mul__( self, other ):
>def Square( self ):
>self *= self
Among the other reasons cited, I believe that 'op=' maps to a different
special method than 'op'. __imul__? or something? do check.
tj
Gerard Flanagan wrote:
> def Square( self ):
> self *= self
You probably mean
return self * self
> A = FibonacciMatrix()
> A.Square()
Make this
A = A.Square()
--
http://mail.python.org/mailman/listinfo/python-list
For the same reason that
def f(z):
z *= z
c = 1
f(c)
print c
prints 1.
Jeff
pgpF5jQBO3otJ.pgp
Description: PGP signature
--
http://mail.python.org/mailman/listinfo/python-list
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
13 matches
Mail list logo
