coefficients of symbolic expressions revamp

[rwst]

The ticket asks for

• adding a sparse parameter to Expression.coefficients(), default True
• removing/deprecating the coeff and coeffs aliases
• implement Expression.list(), simply calling coefficients(sparse=False)

This appears to be consensus for polynomials in the thread https://groups.google.com/forum/?hl=en#!topic/sage-devel/IHirUHTWnuA

Component: symbolics

Keywords: list, polynomial, coeff

Author: Ralf Stephan

Branch/Commit: 0fec129

Reviewer: John Perry

Issue created by migration from https://trac.sagemath.org/ticket/17438

[rwst]

comment:1

OK, noninteger exponents will throw an exception with sparse=False. Any better idea?

[rwst]

Branch: u/rws/coefficients_of_symbolic_expressions_revamp

[sagetrac-git]

Commit: 9452fa9

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

9452fa9

17438: deprecate ex.coeff/coeffs()

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

0fec129

17438: implement ex.list()

[sagetrac-git]

Changed commit from 9452fa9 to 0fec129

[rwst]

Changed keywords from none to list, polynomial, coeff

[rwst]

Author: Ralf Stephan

[johnperry-math]

comment:7

I'm looking at this now. I'm sorry for the delay; I only finished traveling this past weekend.

Unfortunately, it looks like the delay will take even longer, because after checking out your branch, Sage wants to recompile every blessed Cython file... as usual... and it just failed on 'sage/algebras/quatalg/quaternion_algebra_cython.pyx'. Great.

Any ideas?

[johnperry-math]

comment:8

I've left that temporary branch, deleted it, & am first rebuilding the develop branch. I'll try again when Sage quits compiling all the Cython files. The good news is that it made it past sage/algebras/quatalg/quaternion_algebra_cython.pyx. :-)