sympy/sympy

A computer algebra system written in pure Python http://sympy.org/ . To get started to with contributing https://github.com/sympy/sympy/wiki/Introduction-to-contributing

Daniel Shapero

@danshapero

something like

x = sympy.symbols('x', cls=sympy.IndexedBase)
i = sympy.Idx('i')
H = 0.5 * x[i] * x[i]

Aaron Meurer

@asmeurer

so for a lambdified function where one of the variables is a MatrixSymbol, I would always pass in a rank-2 array for it

there is code to represent contractions in sympy.codegen.array_utils

but I would only recommend using it if you are indeed working with higher rank tensors

if you are only dealing with matrices, you don't need to use Indexed

Daniel Shapero

@danshapero

hrm ok, don't really have any higher-rank tensors

I haven't contributed to sympy before -- supposing I want to take a crack at this myself, can you point out where in the source code I'd want to start looking?

Daniel Shapero

@danshapero

ah just found sympy/printing/pycode.py from that issue

Sudhanshu-Taneja

@Sudhanshu-Taneja

I'm interested in working for SymPy. I have read GLPK but I didn't found any of it's codes like. So pls help to know about how and where to start??

vishakha2108

@vishakha2108

I have sent a proposal for gsoc through the mailing list.I request a mentor to review it .

Prakhar Saxena

@Psycho-Pirate

I have some questions regarding risch algorithm, i have asked them on the mailing list. Please

Go through them

death-angel-141

@death-angel-141

The Implementation for Heaviside Function was not correct for Heaviside(0) for integers.So,I think its a bug.

mohit

@mohitshah3111999

hello everyone, My name is Mohit shah and I want to contribute to sympy during this year GSoC.

Arpan Chattopadhyay

@Arpan612

@mohitshah3111999 Hi Mohit, welcome to SymPy. Please find the links below to get started.

https://github.com/sympy/sympy/wiki/Introduction-to-contributing

https://github.com/sympy/sympy/blob/master/README.rst

OmarWagih1

@OmarWagih1

Hello all, I am Omar Wagih and i was interested in contributing to the Benchmarking project for sympy during this summer GSoC, i noticed that there is no specific mentor linked to this project, i read all the contributing pages and the paper and would love to chat a bit on how we can further benchmark sympy and if there's any patches i can add pre-proposal to benchmark some functions as a trial.

SHUBHAM KHANTWAL

@shubham-khantwal

can anyone tell me what does '.' implies in "from .basic import Basic" ? As far i know we can also use from basic import Basic.

SHUBHAM KHANTWAL

@shubham-khantwal

And how do i check whether my changes are right or not in local system. on running a file in between say exprtools.py it is giving error may it import files from parent and could not move to the parent directory for importing a file

Arpan Chattopadhyay

@Arpan612

@shubham-khantwal . implies the current directory

https://stackoverflow.com/questions/48883555/importerror-no-module-named-basic-in-python You may find some help here

SHUBHAM KHANTWAL

@shubham-khantwal

@Arpan612 thanks

Samfield Hawb Bassey

@psalmfill

Hello Everyone, My Name is Samfield Hawb, I wish to contribute to sympy during this year GSoC

SHUBHAM KHANTWAL

@shubham-khantwal

how can i run my project after i made a change?

Arpan Chattopadhyay

@Arpan612

@shubham-khantwal Could you please elaborate?

@psalmfill Hi, welcome to SymPy. Please find the links below to get started.

https://github.com/sympy/sympy/wiki/Introduction-to-contributing

https://github.com/sympy/sympy/blob/master/README.rst

SHUBHAM KHANTWAL

@shubham-khantwal

actually , i made changes to my clone repo and i want to check them . since i have installed sympy from pip , how can i make sure that the code is being checked by my clones repo or installed sympy library?

Arpan Chattopadhyay

@Arpan612

Firstly close any open files and terminal. Then please go to your clone repo folder by terminal and then run the python file which will open your application.

Hope it helps.

SHUBHAM KHANTWAL

@shubham-khantwal

i found a link https://github.com/sympy/sympy/#user-content-tests . can this help?

Kritika Gupta

@kritika12298

Hello I am Kritika Gupta and am looking forward to contribute to the project Classical Mechanics: Implement an O(N) Equation of Motions Method.

Please guide me on how to get started

SHUBHAM KHANTWAL

@shubham-khantwal

Firstly close any open files and terminal. Then please go to your clone repo folder by terminal and then run the python file which will open your application.

right , I could not get that application file , in this case i want to know sympy main file that i could run and check whether all function are working properly or not

Arpan Chattopadhyay

@Arpan612

@shubham-khantwal If you just want to check, I think using sympy bot will be a good idea.

@kritika12298 Hi Kritika, welcome to SymPy. Please find the links below to get started.

https://github.com/sympy/sympy/wiki/Introduction-to-contributing

https://github.com/sympy/sympy/blob/master/README.rst

harshavardhan-99

@harshavardhan-99

I am harrsha from iiit hyderabad india. I am interested in working on "Continuum mechanics: Creating a Rich beam Solver and Extending Continuum Mechanics module". I have thought of possible addition I can make to this module . I'm even working on some issues.

The issues are :

Developing polygon geometric cross-sections using FEM modelling of the cross section
Calculating the first moment of area for ellipses class
Making composite shapes using Boolean operations on basic shapes in the geometry module.
Developing separate cross section APIs for steel and concrete beam(with reinforcement orientation included)(including T beam , Rectangular, Steel)
Implementing Moment curvature module for nonlinear analysis of Beam
Plotting graphs related to Moment curvature analysis.
Implementing fiber analysis model of Beam

2D frame structure implementation and its calculations using method of matrix displacement method. It won’t be a part of beam module, but can be taken under continuum mechanics.
Performing stability analysis of columns and frame
Implementing simple frames Buckling and its calculations.
Plotting graphs related to frame buckling

Please suggest any particular issues I can add to my proposal which are more important this time.

Mean while I will come up with my plan on implementing these to the sympy repo

harshavardhan-99

@harshavardhan-99

I will send the proposal plan to the corresponding mentor in mailing list

Please review it

Smit Gajjar

@smitgajjar

There is no documentation for C and Fortran Parser which is in parsing package! If it is available, please share the link here. Thanks

Vatsal Srivastava

@sava-1729

Hi, I have added a function to sets.py, but it's not getting imported along with the other classes/functions in sets.py

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