Hello,
When creating a Matrix from another one, no new object is created
m1 = Matrix(2, 2, range(4))
m2 = Matrix(m1)
m1 is m2
returns True, so changing m1 will also change m2. I know I can use
m1.clone(), but
since SomeClass() usually creates a new object, this took me rather by
surprise.
Is
Hrm, yes, this should probably change.
Having things the way they are now accelerates a few internal functions.
This acceleration probably isn't worthwhile though given the confusion you
bring up. I'll send in a PR with this change in a bit.
In general the internals of Matrices were changed aroun
Fixed in https://github.com/sympy/sympy/pull/1121
On Wed, Mar 14, 2012 at 8:53 AM, Matthew Rocklin wrote:
> Hrm, yes, this should probably change.
>
> Having things the way they are now accelerates a few internal functions.
> This acceleration probably isn't worthwhile though given the confusion
