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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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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

Please help

Also, how are we supposed to run tests?

Vatsal Srivastava

@sava-1729

I have installed sympy via pip, and cloned the repo too, in separate directories though. So is it getting confused because of that?

Smit Gajjar

@smitgajjar

@sava-1729 Try calling that function from your module after specifying relative or absolute path to the sympy repo you cloned

Something like this

from <path>.sympy import sets

Or if your module lies in sympy repo, simply: from sympy import sets

Anubhav Gupta

@sudoWin

Another way of doing that could be you can just go to your cloned folder, and then you can do

python3 ./bin/isympy

That will run an IPython Notebook with your module and changes imported

SHUBHAM KHANTWAL

@shubham-khantwal

can somebody explain how isympy is running notebook . all i see is some os and sys code that is working over some path

Kalevi Suominen

@jksuom

This is the chain of calls: isympy -> init_session -> ipython -> notebook.

SHUBHAM KHANTWAL

@shubham-khantwal

ok... thanks

Maarten van der Velde - (Ideogram)

@ideogram

Dear people, I hope I can 'shoot' a quick question here...: Is there a way to PREVENT sympy's evalf() function from interpreting the letter 𝐈 (capital i) as √-1 ? For that matter, can I pursuade it to understand the letters E and N as 'just' another symbol holding a variable?

(I tried googling it, but this question seems a bit too vague for Google to handle. Neither can I find anything in the documentation of the eval function or in source code of SymPy)

Kalevi Suominen

@jksuom

Would it suffice to define those as symbols: E, I, N = symbols('E I N')?

Maarten van der Velde - (Ideogram)

@ideogram

Okay, I will try that. I did not define them, as I used subs. Thanks!

SHUBHAM KHANTWAL

@shubham-khantwal

hello guys , i got an error "cannot import name add" . Can somebody help me with that ? i am getting this error whenever i am trying to shift function from one class to another or while creating new class

Maarten van der Velde - (Ideogram)

@ideogram

@jksuom Thanks,... it didn't help, though :)

SHUBHAM KHANTWAL

@shubham-khantwal

@ideogram why you want to use only predefined symbols. why don't you use another set?

Maarten van der Velde - (Ideogram)

@ideogram

@shubham-khantwal It might, in the most extreme case, be used on user input. 'I' is a common variable to use for iterations, so I can expect people to use that variable.

SHUBHAM KHANTWAL

@shubham-khantwal

OK..

Maarten van der Velde - (Ideogram)

@ideogram

I now notice that is only capital "I, E and N" that have this problem, 'i, e en n' are okay. But still.

@shubham-khantwal I work on the dynamic generation of drawings, CAD-style. I want to construct a kind of macro-language for the end-users.

Maarten van der Velde - (Ideogram)

@ideogram

@shubham-khantwal How could I combine that with a subs dict?

Kalevi Suominen

@jksuom

from sympy.abc import I and I = Symbol('I') do the same thing. One of them will suffice to make I different from sqrt(-1).

Maarten van der Velde - (Ideogram)

@ideogram

Yes, I read that too, but it seems not to suffice. Maybe it's because my subs dict is somewhat strange? result = expr.evalf(subs=self.__values}) with self.__values = 'L': 80, 'W': 50, 'H': 150, 'F': 20, 'I': 1, 'Y': 1

death-angel-141

@death-angel-141

Any potential mentor for the gsoc idea of Classical Mechanics: Efficient Equation of Motion Generation with Python with whom I can disuss the related work

Kalevi Suominen

@jksuom

What is the type of the object on the rhs of self.__values = 'L': 80, 'W': 50, 'H': 150, 'F': 20, 'I': 1, 'Y': 1?

SHUBHAM KHANTWAL

@shubham-khantwal

does any got any idea that how can i deal with circular dependency easily ? there are some tricks but still being a large projects there is always a dependency that occurs on making some changes...

SHUBHAM KHANTWAL

@shubham-khantwal

And there are some Add file that are imported from .expr while we already have Add class in add file imported in same file . so how can we differentiate both?

Kalevi Suominen

@jksuom

@ideogram It looks like the objects that you are substituting in evalf are literal strings of type str like 'I' and not SymPy objects denoted by Python identifiers like I.

Vatsal Srivastava

@sava-1729

I've cleared all conflicts etc in my PR, someone please review it.

#18861

Praveen Sahu

@povinsahu1909

Made changes in singularity handling in plot. And want review in my PR #18856.

Hari07

@Hari-07

Hey Everyone, Im Harinandan. I would like to contribute to SymPy as Part of GSoC 2020

Besides coding math is my second passion, so i think even math intensive projects will be fine for me.

Do tell me what i should do

Mazen Amr

@mazenamr

Hey guys, I'm Mazen from Cairo, Egypt

Arpan Chattopadhyay

@Arpan612

@UltimateGamer07 Hi Harinandan! Welcome. 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

@mazenamr Hi Mazen. If you wish to contribute, please have a look at the links above.

Shashank07-creator

@Shashank07-creator

Hey Everyone , i m Shashank. I would like to contribute in SymPY ' s physics projects. Though, i'm a coder but i love physics too. Do tell me what to do.

Arpan Chattopadhyay

@Arpan612

Hi Shashank! Welcome. 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

I hope you have gone over the projects and have decided which one would you like to do.

Hari07

@Hari-07

I saw that in the google groups people had mentioned what idea they want to do for gsoc and were having discussions on the same. I too posted my idea yet there was no response from anyone, are there any other prerequisites before discussing project idea on the google group?

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