On 12 ago, 11:38, Jason Grout <[email protected]> wrote:
>
> Well, there is a general trend towards using functions instead of
> attributes in Sage. I think the main reason is for documentation (I
> wish python had attribute docstrings that we could query!).
>
They wouldn't be attributes (that would involve having several copies
of the matrix data in the object), they would rather be properties. A
property is a method that looks like an attribute (it doesn't use
parenthesis), but calls a function each time it's used. Example:
sage: class Foo:
....: @property
....: def bar(self):
....: """This is a function that returns 'hello'."""
....: return 'hello'
....:
sage: a=Foo()
sage: a.bar
'hello'
sage: a.bar?
Type: property
Base Class: <type 'property'>
String Form: <property object at 0xb2822fc>
Namespace: Interactive
Docstring:
This is a function that returns 'hello'.
(...)
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