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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

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Release-Notes-for-1.10
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Nikhil Maan

@Sc0rpi0n101

Hey everyone, I am Sarthak Srivastava. I would like to contribute in SymPY's mathematics's projects. Although, I am pursuing cse from MSIT but maths has always intrigued me. So, kindly let me know what to do.

Hi Sarthak,

You can check out https://github.com/sympy/sympy/wiki/Introduction-to-contributing and https://github.com/sympy/sympy/wiki/Development-workflow to get started with development. You can also check out https://github.com/sympy/sympy/blob/master/README.rst for general installation and usage instructions.

Mohit Balwani

@Mohitbalwani26

if I want to add a function in the tests file of some module which needs some parameter then where do I need to make changes so that it doesn't throw an exception. For example, I want to add a def test_solver(eq, hint) in test_ode.py but it throws an exception for missing argument as sympy runs test_file by calling every function.

vishakha2108

@vishakha2108

pull request #18880 has an unsuccessful check because of Travis ci build failed.Can someone guide me on how to resolve this error

Kalevi Suominen

@jksuom

There is trailing whitespace. This is the Travis log message: AssertionError: File contains trailing whitespace: /home/travis/build/sympy/sympy/sympy/geometry/parabola.py, line 379.

Prashant Rawat

@prshnt19

Please review my PR sympy/sympy-live#144.

Hari07

@Hari-07

@Sc0rpi0n101 I want to work on either the Classical Mechanics, Efficient equation of motion generation with python or on Stochastic Processes in Probability Section, preferably the former.. and was hoping to have a discussion on where to start off on either of them

Also i was looking through the easy to fix issues to fulfill the patch requirements for GSoC Application, however all core issues are having commits or people working on them. Any other suggestions to meet this requirement?

ritwikchakraborty123

@ritwikchakraborty123

hi my self ritwik

i want to contribute on classical physics project development for implementing classical physics solution which can be used with sympy api ..

the quantum mechanics implentation with graphical implementation

Maarten van der Velde - (Ideogram)

@ideogram

@jksuom (on the subject of the numbers I,E and N) Yes, that is true, because I can't know in advance what variables will be used in the expressions. So, I collect them in a dict and feed that dict to the evalf function.

Asingh421

@Asingh421

hello I am Abhay Singh a second year cse student at IIT Patna,i want to contribute in Mathematics and physics projects for GSOC because math and physics always fascinated me since my school time please guide me.

Arpan Chattopadhyay

@Arpan612

@ritwikchakraborty123 @Asingh421 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/wiki/Development-workflow

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

Kalevi Suominen

@jksuom

@ideogram How do you define the dict? If you write dict(I=1), you get {'I': 1} whose key is a literal (that probably is not used in the expressions). If you define I as a SymPy symbol, for example, then you can define the dict {I: 1} that has I as a key.

Maarten van der Velde - (Ideogram)

@ideogram

@jksuom Oh,... eh,... terribly confused now,... you are saying I can use a SymPy Symbol as as a key in a dictionary?

ParameterName = "I" # But then dynamiccaly _self.values[Symbol(ParameterName)] = 42

Kalevi Suominen

@jksuom

The keys in a dict argument of subs are usually SymPy objects.

Hari07

@Hari-07

Im running python on ubuntu WSL. when i use the python terminal and write scripts in a folder thats not the sympy folder, throws an error. this gets fixed when i use sys.path.append to include the sympy folder then use import sympy

is there anyway to add it to sys.path permanently

Arpan Chattopadhyay

@Arpan612

I think you can do that by adding a python module to sys.path as default

https://askubuntu.com/questions/470982/how-to-add-a-python-module-to-syspath

This might help you out.

Maarten van der Velde - (Ideogram)

@ideogram

@jksuom Thank you, I'll try that. I completely missed that from the documentation. (Kiitos, I gues)

Kalevi Suominen

@jksuom

@UltimateGamer07 If you run python -m site, you will see the location of USER_SITE. That is a place where you can add local paths permanently in files of type .pth. For example, you can create a file sympy.pth that contains the single line /path/to/sympy.

OmarWagih1

@OmarWagih1

Hello, could anyone review my pull request for the sympy-benchmarks repo here?
sympy/sympy_benchmarks#66
Thank you.

Arpan Chattopadhyay

@Arpan612

@asmeurer Could you please tell me where is the source code of SymPy documentation?

I have corrected the code of issue 18891 and I want to make a PR for the same.

Nikhil Maan

@Sc0rpi0n101

Most of the documentation is generated from the docstrings of the class/function being documented.

Arpan Chattopadhyay

@Arpan612

So no cataloged folder for the entire documentation exists?

mohit

@mohitacecode

I think it is there https://github.com/sympy/sympy_doc

Nikhil Maan

@Sc0rpi0n101

I think it is there https://github.com/sympy/sympy_doc

That's auto-generated. You should not manually make changes to that repo.

IF you want to make changes to the documentation, you should just update the docstring of the respective function/class.

Kalevi Suominen

@jksuom

@Arpan612 The rst-files for Sphinx documentation are in doc/src and its subdirectories.

Megan Ly

@meganly

How do you simplify (sqrt(x)+1)/(sqrt(x)*(x+sqrt(x)) to 1/x? I know using radsimp and cancel works, but am wondering if there is a better way

Aaron Meurer

@asmeurer

@Arpan612 the docs are in the doc/ directory of the main sympy repo. But as @Sc0rpi0n101 noted most of the documentation comes from the docstrings on the functions themselves.

@meganly I don't know if there's a better way. Simplification of algebraic functions is something that SymPy needs to be improved on.

we don't have a function that takes an algebraic function and puts it into canonical form (like cancel does with rational functions)

something that can help here is minpoly. minpoly((sqrt(x)+1)/(sqrt(x)*(x+sqrt(x)), y) gives x*y - 1 meaning that the expression equals 1/x

Aaron Meurer

@asmeurer

I've mentioned it on some issues before, but we should have a simplification function that uses minpoly. If the minimal polynomial is linear or constant then the simplification is trivial. It's harder if the degree is higher because you have to make sure you keep the same root, but it's doable.

Aaron Meurer

@asmeurer

I didn't see any dedicated issue for it so I opened sympy/sympy#18907

Megan Ly

@meganly

The minpoly idea is cool. Is there a canonical form for algebraic functions? If so, what is it?

Aaron Meurer

@asmeurer

I'm not sure if there's a straightforward way to define one.

I think you can do something using the fact that algebraic extensions form a vector space over the extended field. So if you have a basis, then every element of the extension is a linear combination of those basis elements. But there's the question of how to chose that basis in a canonical way.

Megan Ly

@meganly

That's something you could do, but I don't think that works for quotients of algebraic expressions. As far as I know there isn't really a canonical form for algebraic functions like there is for rational

Saanidhya

@Saanidhyavats

After making some changes in pull request #18681 I think it's ready to be merged. It would be helpful if someone could take a look init.

Dhruv Mendiratta

@dhruvmendiratta6

@jksuom @Arpan612 I too am running wsl with the sympy repo in windows. I am not able to run profilers(eg: vprof) I installed in ubuntu on the repo. Also local tests using ./bin/test do not work on ubuntu. So is the solution here simply cloning a wsl version of the sympy repo and keeping its functioning separate from windows?

Arpan Chattopadhyay

@Arpan612

Yes, I think this solution will be best for now.

If I get any alternative, I will tell you.

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