Opened 10 years ago

Last modified 10 years ago

#9989 closed enhancement

easier access to operands of a symbolic expression — at Initial Version

Reported by: burcin Owned by: burcin
Priority: major Milestone: sage-4.7.1
Component: symbolics Keywords: sd31
Cc: jpflori Merged in:
Authors: Burcin Erocal Reviewers:
Report Upstream: N/A Work issues:
Branch: Commit:
Dependencies: Stopgaps:

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Description

Attached patch adds an op attribute to symbolic expressions which gives easy access to its operands. We now have:

sage: x,y,z = var('x,y,z')
sage: e = x + x*y + z^y + 3*y*z; e
x*y + 3*y*z + z^y + x
sage: e.op[1]
3*y*z
sage: e.op[1,1]
z
sage: e.op[-1]
x
sage: e.op[1:]
[3*y*z, z^y, x]

Using __getitem__() directly was not an option since it breaks conversion to numpy.

Change History (1)

Changed 10 years ago by burcin

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