Where communities thrive


  • Join over 1.5M+ people
  • Join over 100K+ communities
  • Free without limits
  • Create your own community
People
Repo info
Activity
  • Jun 29 10:28

    anutosh491 on GSOC_Pr1_Refactoring_Log_leading_term_method

    Added expand to log rewrites (compare)

  • Jun 29 09:23

    anutosh491 on GSOC_Pr1_Refactoring_Log_leading_term_method

    updated test for asin,atan,acot… (compare)

  • Jun 27 12:01

    anutosh491 on GSOC_Pr1_Refactoring_Log_leading_term_method

    removed wrong test (compare)

  • Jun 27 11:21

    anutosh491 on GSOC_Pr1_Refactoring_Log_leading_term_method

    Modified test (compare)

  • Jun 26 00:22

    anutosh491 on GSOC_Pr1_Refactoring_Log_leading_term_method

    Fixed leading term for acos/ase… (compare)

  • Jun 25 09:43

    anutosh491 on series_for_arg

    Updated code (compare)

  • Jun 24 13:33

    anutosh491 on GSOC_Pr1_Refactoring_Log_leading_term_method

    Improved code quality (compare)

  • Jun 22 14:25

    anutosh491 on GSOC_Pr1_Refactoring_Log_leading_term_method

    Fixed code quality (compare)

  • Jun 22 14:17

    anutosh491 on GSOC_Pr1_Refactoring_Log_leading_term_method

    Added test for 21721 (compare)

  • Jun 22 10:02

    anutosh491 on GSOC_Pr1_Refactoring_Log_leading_term_method

    Fixed Failing tests (compare)

  • Jun 20 13:32

    anutosh491 on GSOC_Pr1_Refactoring_Log_leading_term_method

    Code Cleanup (compare)

  • Jun 18 02:50

    anutosh491 on GSOC_Pr1_Refactoring_Log_leading_term_method

    Fixed error in test_sums_produc… (compare)

  • Jun 17 14:28

    anutosh491 on GSOC_Pr1_Refactoring_Log_leading_term_method

    Fixed all failing tests (compare)

  • Jun 17 13:41

    anutosh491 on GSOC_Pr1_Refactoring_Log_leading_term_method

    prevent unnecessary hashing add type hints to printing/late… Merge pull request #23588 from … and 34 more (compare)

  • Jun 10 13:16
    anutosh491 commented #22373
  • Jun 10 13:15
    anutosh491 commented #22373
  • Jun 10 12:42
    anutosh491 commented #22806
  • Jun 10 12:39
    anutosh491 commented #22806
  • Jun 10 12:21
    github-actions[bot] commented #23614
  • Jun 10 12:15
    github-actions[bot] commented #23541
Miguel Guthridge
@MiguelGuthridge
Like if I make them use the value of n in the substitution then it works completely fine
>>> x = sympy.Subs(n, n, 1)
>>> y = sympy.Subs(n, n, 2)
>>> x + y
Subs(n, n, 1) + Subs(n, n, 2)
The only loosely related thing I can find is this issue, but it doesn't really explain why I'm getting this issue... it's not like I'm working with booleans
sympy/sympy#13427
ThePauliPrinciple
@ThePauliPrinciple
is there any object to indicate something along the lines of a numpy "einsum" in sympy?
Anutosh Bhat
@anutosh491
Hello guys , I need help regarding the setup. I use windows10 and WSL(windows Subsystem for linux) .So I had wanted to create my first PR yesterday and I realized that text_sphinx.sh was the only test failing . I fixed many issues I was facing since morning now I am closer to the finish line but I am just not being able to pass an error.

'Build finished; the LaTeX files are in _build/latex.
Set the environment variable LATEXMKOPTS='-xelatex -silent'
And run `make all' in that directory to run these through xelatex.
latexmk -pdf -dvi- -ps- 'sympy-1.10.dev.tex'
Latexmk: This is Latexmk, John Collins, 26 Dec. 2019, version: 4.67.
Latexmk: applying rule 'pdflatex'...
! Fatal Package fontspec Error: The fontspec package requires either XeTeX or
(fontspec) LuaTeX.
(fontspec)
(fontspec) You must change your typesetting engine to,
(fontspec) e.g., "xelatex" or "lualatex"instead of
(fontspec) "latex" or "pdflatex".

Type <return> to continue.
...

l.45 \msg_fatal:nn {fontspec} {cannot-use-pdftex}'

I have tried everything I had but I am not sure how to get past this , any help would be appreciated !
Oscar Gustafsson
@oscargus
@anutosh491 I think you need to install xelatex as well. It seems like latexmk is executed with the -xelatex option, so my guess is that it cannot find xelatex.
Anutosh Bhat
@anutosh491
thanks a lot @oscargus . I did install xetex using apt-get install texlive-xetex . Not sure if that was a correct way around
Anutosh Bhat
@anutosh491
will running something like this help !
latexmk -pdf -pdflatex="xelatex" -use-make sympy-1.10.dev.tex
ThePauliPrinciple
@ThePauliPrinciple
Also, what is prefered method to change printing behaviour of a specific object in a script (as in, I just want a more convenient format for my usecase)
In particular "Idx(i,(0, N−1)),Idx(j,(0, N−1))" could just "i,j" for me when using the latex printer
*the prefered method
Oscar Gustafsson
@oscargus
@anutosh491 so it works? -pdflatex="xelatex" should be the same as -xelatex as far as I understand. But great if it works!
@ThePauliPrinciple The best way would be to add a _print_Idx-method to the LaTeX printer and it seems like your approach is probably what everyone would like. If you want to make your own, you can subclass the LaTeX printer and (re)define that method.
Oscar Gustafsson
@oscargus
All other printers use these lines, which may do the trick:
def _print_Idx(self, expr):
return self._print(expr.label)
Anutosh Bhat
@anutosh491
@oscargus I was just about to write back to my previous message . Yeah that worked . So so happy ,took me a whole day since 6 am -6pm here in india to figure out so many small small errors due to which test_sphinx.sh wasn't passing . Now I can peacefully contribute/send PR's . All this is due to WSL and its compatibility with different modules/packages in Sympy . Eg inkscape commands haven't been implemented in Ubuntu(20.04/19.04) installed through WSL so had to find a way around that (some dirty trick I had to do) .
ThePauliPrinciple
@ThePauliPrinciple
Hmm, I seem to get some issues now with the colab printing snippit I stole
Anutosh Bhat
@anutosh491
I feel most of the contributors would be setting up sympy on linux and not windows probably hence not all would be facing such errors but still for ones who would eventually set it up on Windows I would be writing a blog of how one can successfully setup up Sympy on windows and get around the shortcomings in WSL1/WSL2 and maybe if that's good enough , i'll ask the community if I can put it up on the developement workflow setup for refernce on github wiki
ThePauliPrinciple
@ThePauliPrinciple

class custom_latex(sy.printing.latex):
def _print_Idx(self,expr):
return self._print(expr.label)

complains "init() takes 3 positional arguments but 4 were given" I feel like I'm writing some typo I don't realise?

Oscar Gustafsson
@oscargus
@anutosh491 I think your are correct. I have not set up document building on my Windows laptop...
@ThePauliPrinciple latex is just a wrapper for the class LatexPrinter.print() if I recall correctly.
So you should subclass LatexPrinter instead and possibly provide a similar command.
ThePauliPrinciple
@ThePauliPrinciple
Ah I see
ThePauliPrinciple
@ThePauliPrinciple
Yeah, got it to work!

class CustomLatexPrinter(LatexPrinter):
def _print_Idx(self,expr):
return self._print(expr.label)

@sym.printing.printer.print_function(CustomLatexPrinter)
def custom_latex(expr,**settings):
return CustomLatexPrinter(settings).doprint(expr)

ThePauliPrinciple
@ThePauliPrinciple
Thanks a lot :)
ThePauliPrinciple
@ThePauliPrinciple
from sympy import IndexedBase,symbols,Idx,Derivative
X = IndexedBase('X')
D = IndexedBase('D')
i= symbols('i', cls=Idx)
Derivative(X[i]*X[i],D[i])
Is there some way to tell sympy that X is a function of D?
pillsy
@pillsy
Is there a way to match (not just replace) a pattern where the argument is fixed and the function is wild?
In Mathematica, I'd match a pattern like f_[x]
pillsy
@pillsy
Variations on this don't work:
sympify('f(x)').match(Function(Wild('g'))(Symbol('x')))
(Stripping the commutative assumption off of the Wild symbol doesn't do the trick....)
pillsy
@pillsy
OK, I can do something like this:
F_x = Wild('F', properties=[lambda e: e.args == (x,)])
Swagat S. Bhuyan
@SwagatSBhuyan
Hello, I'm Swagat from india. Looking forward to contributing to Python. If anyone would be kind enough to guide me in these initial stages of getting the hang of it and starting to contribute, that would be really great. Thanks!
Tirthankar Mazumder
@wermos
I too am looking to contribute to SymPy!
Sidharth Mundhra
@0sidharth
https://github.com/sympy/sympy/wiki/Introduction-to-contributing has some pointers to help get you started
Anutosh Bhat
@anutosh491
Hello ,I am trying to approach couple of issues involving Sum.doit() but I am not able to understand completely how doit works for a Sum/Integral ( sometimes the recursive call and other times the not so self-explanatory variables like 'rep','did' etc (yeah i know its not possible to write self-explanatory variables always) in the code throw me off and finding it a bit tough to relate as a whole .
any guidance by someone familiar with doit/concrete module regarding how does doit calculate a basic sum like an infinite geometric series would be great ! Thanks
ThePauliPrinciple
@ThePauliPrinciple
Just wanted to point out that I wrote some ideas/examples in https://github.com/sympy/sympy/discussions/22219 looking forward to any feedback
ThePauliPrinciple
@ThePauliPrinciple
Thanks for the reply @oscarbenjamin !
falematte
@falematte
image.png
I think that I found a bug on the evaluation of the limits of a function that I summarize in this pic. Any tips? I can also provide the code to reproduce it.
Of course L and r are symbols positive defined
falematte
@falematte
I have opened and Issue here, please contribute sympy/sympy#22220
The limit is different in the discontinuity points.
ThePauliPrinciple
@ThePauliPrinciple
I am looking to setup a workflow to work on a pull request. In particular, I am looking for some way to be able to edit the library and then immediately check manually/interactively if I obtained the intended result. For example, to have a conda environment which uses the fork as the source for sympy. Any ideas? I have read through the development workflow document, but I feel I'm missing the point on how to do this effectively.
anonbox.netuser
@anonbox.netuser:matrix.org
[m]
Hi, is sympy 1.9 officially released? I saw it is tagged on github, but the usual files for downloading are missing and pypi also only lists 1.9cr1 as latest version. The sympy.org website is also not helpful in this regard, showing the release of 1.7.1 as latest news.
Anutosh Bhat
@anutosh491
Hi guys , I was solving an issue regarding functions/limits and I came across something which might help . So do we have any method /function in sympy that checks whether some function/expression might encapsulate or bound another expression . Like is there any way I could check something like -1/x < cos(x)/x < 1/x or even one sided
ThanhVu (Vu) Nguyen
@nguyenthanhvuh
Hi, it seems that the .subs function is quite slow. When I have a long expression e (can contain nonlinear terms like x**2, y*x*z), calling e.subs(some_dict) takes quite sometime (a sec or so). In fact subs is often slower than solving for large equations. Am I using subs correctly?