On Feb 27, 2010, at 6:22 PM, Dima Pasechnik wrote:
In a sage function I need to use Sage's built-in types, say, vector.
E,g,
def foo(bar):
from import vector as v
a=v(bar)
How do I find out from where it has to be imported?
(I haven't come up with anything better than running a grep on devel/
sage/sage/*/*.py* looking for vector and import)
Is this from a Python script? If so the safest way is to do from
sage.all import vector as v as there is sensitivity in the order
things are imported. In the library, you'll have to see where it's
defined, or do something like from sage.modules.all import vector as
v if you're using it from a non sage.modules package. Usually you
don't want to be too specific, or that created unneeded dependancies
(the current order things get imported in is a mess...).
The easiest way to see is to do
sage: vector.__module__
'sage.modules.free_module_element'
- Robert
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