Release 0.9.1 of Algebra-with-Sympy package...

[gu...@uwosh.edu]

I would like to make everyone aware of an update to the Algebra-with-Sympy package. This is a working implementation of algebraic manipulation of equations with the relational operator "=". This implements a superset of the functionality proposed in this PR21333 and this SymPEP.

Updates since the last release include:

• Equations labeled with their python name, if they have one.
• Added flags to adjust human readable output and equation labeling.
• Accept equation as function argument in any position.
• First pass at solve() accepting equations.
• Added override of root() to avoid warning messages.
• More unit tests.
• First pass at documentation.

Hope people find this useful. I have primarily been using it for producing answer keys for physical chemistry classes and for development of expressions for data analysis.

Regards,

Jonathan

[Jason Moore]

Jonathan,

I am not up-to-date on the discussions about contributing this to sympy, but why is there a sympep? If you are proposing adding a new module that solves equations, it seems that would only require a pull request and discussion there to refine.

If you are, on the other hand, planning to change core functionality in sympy, then I can see the need for a sympep.

I'm only mentioning this to suggest that going for a PR would likely be a faster track to getting this great functionality into sympy.

Jason

moorepants.info
+01 530-601-9791

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[gu...@uwosh.edu]

Jason,

The reason for the SymPEP is that the PR's for this functionality engendered a lot of discussion, with no final resolution. Part of the issue is that the functionality does require making some of the base classes (e.g. `class Function()`) equation aware. I do that in my package by extending the function class and then rerunning the `class funcX()` statements for all functions in `function._all_`. This is a bit sketchy, but works. Additionally, there is disagreement on how some of the calculus operations should behave.

Anyway, I would be happy to get this functionality into sympy proper, but the community needs to come to a consensus on what functionality to include and how. I have not yet been able to generate that consensus.

Thanks for the encouragement.

Jonathan

[Chris Smith]

Jonathan, I left a comment at https://github.com/sympy/SymPEPs/pull/1#issuecomment-1078989487 about a possible way to think about Eqn (or something similar) that may help to relax concerns about mathematical correctness.

/c

[Jason Moore]

Jonathan,

Ok, that's clear. Thanks. A sympep probably is the best bet then.

Jason

moorepants.info
+01 530-601-9791

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