gsoc-2022-symbolic-package-blog/updated-timeline.md

TODO Deliverables

• (Present) [Week 1-4] work towards 3.0.0 milestones

  • [Week 1-2] either support or blacklist Sympy 1.9
    • investigate if Sympy 1.9 should be blacklisted (see #1109)
    • support Sympy 1.9 if we do not blacklist it
      • run tests and doctests to check for regressions
      • fix all fixable regressions & mark all unfixable ones to XFAIL
      • enable CI for Sympy 1.9
  • [Week 1-2] support Sympy 1.10.1
    • run tests and doctests to check for regressions
    • fix all fixable regressions & mark all unfixable ones to XFAIL
    • enable CI for Sympy 1.10.1
  • [Week 3-4] improve existing CI
    • investigate if all travis CI tests were already ported to GitHub actions
    • port remaining tests if make sense
    • remove the travis CI file #1072
    • CI: update doctests matrix after heaviside fixes #1103
  • [Week 3-4] sympref test fails when in read-only directory #1060
    • create temporary files in TMPDIR instead of the current directory
  • [Week 3-4] output argument error handling change in Octave 7.1 #1111
    • adjust tests based on Octave version
  • [Week 4] release octsympy 3.0.0 if sufficient milestones are completed

• (Past) [Week 5-8] fix long-standing bugs

  • [Week 5-6] add cart2pol function and friends #865
  • [Week 5-6] support sortrows #362
  • [Week 5-6] adjoint function for numerical input #1049
  • [Week 7-8] ztrans #853
    • use the series definition of (unilateral) z-transform
  • [Week 7-8] Piecewise Support #582
  • [Week 8] fix additional bugs depending on our progress

• [Week 8] [Week 7] phase 1 report (should be in week 7 rather than week 8)

• <Optional> (Future) [Week 9-12] make octsympy easier to maintain (Future part changed after discussion with mentor @cbm755, we can still work on the original plan if time allows but this seems unlikely to me)

  • [Week 9-10] disable popen2 and system IPC mechanism to simplify debugging
  • [Week 9-10] create a new experimental xsym (classdef) class acting as a thin wrapper for underlying Sympy values
  • [Week 9-10] incrementally update functions to support xsym values
    • only octsympy functions and primitive py.sympy methods should be used when dealing with xsym values
    • pycall_sympy__ should never be called when dealing with xsym values
  • [Week 11-12] investigate what is the best way to expose the full functionality of Sympy with less glue and create a proof-of-concept
    • we should focus on user extensibility and make it easy for users to define their own wrapper around Sympy functions, methods or constants
    • probably we need a way to get the underlying Sympy value out of a xsym value
  • [Week 9-12] get non-expr out of matrix as much as possible since sympy deprecated the use of non-expr in matrix (see #1124)
    • [Week 9-10] investigate draft PR #1194
    • [Week 9-10] investigate laplace test giving deprecation warning on SymPy > 1.9 #1052
    • [Week 9-10] investigate eq: giving TypeError: cannot determine truth value of Relational #1055
    • [Week 11-12] fix laplace test giving deprecation warning on SymPy > 1.9 #1052
    • [Week 11-12] fix tracker issue for non-Expr in matrices #1124 if time allow

• [Week 13] final report