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
the virtual environment using conda , and cloned it to my local machine.
I am new to sympy, Some advice on how to get started , understanding the codebase would be really helpful.
def issymbolic(*args):
'''
Test is some of the element of args list is an
instance of sympy
Parameters
----------
args: list
List with differents types of elements they
could be float, int or sympy instances
Returns
-------
Return True if someone of the elements of args list is a
sympy instance, otherwise return False.
'''
from sympy import core
return True in [isinstance(args[i],tuple(core.all_classes)) for i in range(len(args))]
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however with the version 1.10..1, this function don't work, the error says that sympy.core don't have all_classes atribute. Someone can help with this problem? or somene can say me where all_classes is?
Hello. I am a math teacher at secondary level (2 last years of hight school, in Brussels). I would like to know if sympy can be used as PhotoMath does and give the detailed computation to teach and train students, not only the solution ? Much thanks for your advices and help
expr1 = exp((10 - 2)2 + (y - (-3))2) this expression is equal to 100
1 reply
it is giving me complex roots with solve
Hello soutrik, check out the contribution guidelines at https://docs.sympy.org/latest/contributing/index.html, For development workflow check out https://github.com/sympy/sympy/wiki/Development-workflow. Browse through github issues to find out issues labeled "easy to fix".
from sympy.physics.quantum import Commutator, IdentityOperator, Operator
from sympy.physics.quantum.operator import DifferentialOperator
from sympy import Derivative, Function, Symbol
from sympy import sqrt
f = Function('f')
y = Symbol('y');x = Symbol('x');z = Symbol('z')
p1 = DifferentialOperator(-1j*Derivative(f(x,y),x),f(x,y))
p2 = DifferentialOperator(-1j*Derivative(f(x,y),y),f(x,y))
H = (p1**2 + p2**2)/2 - DifferentialOperator((z/(sqrt(x**2 + y**2)))*f(x,y),f(x,y))
Lz = x*p1 - y*p2
com_lh = Commutator(H,Lz)
com_lh.doit()
the result should be zero.
from sympy import *
x, y, z = symbols('x y z')
steradian_expr = integrate(z / (x**2 + y**2 + z**2)**1.5, (x, -1, 0), (y, -1, 0))
steradian = steradian_expr.evalf(subs={z: 10})
print(steradian)
steradian_expr = integrate(z / (x**2 + y**2 + z**2)**1.5, (x, 0, 1), (y, 0, 1))
steradian = steradian_expr.evalf(subs={z: 10})
print(steradian)# output
-0.00990115187117096
0.00990115187117096Why the two results are opposite?
The integral is computed by
meijerint that cannot reliably be used on the negative real axis. Hence the first integral has wrong sign.
Can sympy give the path to the solution of a derivative , a limit calculation or an intégral ? Like what photomath or wolfram Alpha do
13 replies
I had a question that in this 'https://docs.sympy.org/latest/modules/testing/runtests.html' doc it is written py.test, my confusion was what is py.test or it is pytest
Hello everyone, I want to solve this functions, but it return
[]. That's why?from sympy.solvers import solve
from sympy import Symbol
from sympy import sqrt
x = Symbol('x')
y = Symbol('y')
z = Symbol('z')
expr = [2130 - sqrt((x-8413)**2 + (y-13233)**2 + (z-544)**2)/4700,
2150 - sqrt((x-8384)**2 + (y-12857)**2 + (z-524)**2)/4700,
2258 - sqrt((x-8941)**2 + (y-12632)**2 + (z-549)**2)/4700,
2198 - sqrt((x-8691)**2 + (y-12737)**2 + (z-531)**2)/4700]
args = [x,y,z]
res = solve(expr,args)
print(res)
Hello. I have not understood how I can run sympy in a terminal, and have the output as in https://gamma.sympy.org that is all the steps of a derivative or an integral and comment, and export that to latex for example.
2 replies
Much thanks for your help and suggestions
Regards
Hi guys I was wondering if sympy supports solving matrix equations:
from sympy import *
n = 2
A = MatrixSymbol('A', n, n)
x = MatrixSymbol('x', n, 1)
b = MatrixSymbol('b', n, 1)
solve(A*x-b, x)
Hey, I want to start open source contribution as I am a beginner please guide me in issue #24140 (sympy/sympy#24140). I am getting this while trying the make linecheck.
Ambiguity:
# Python 3.9.16 (main, Dec 7 2022, 01:11:51)
# [GCC 9.4.0] on linux
from sympy import evaluate, Rational, sympify
rational1 = sympify('1/5 + 1/4', rational=True, evaluate=False)
with evaluate(False):
rational2 = Rational(1, 5) + Rational(1, 4)
rational1 == rational2
False
from sympy import __version__
__version__
'1.11.1'but
rational1
1/5 + 1/4
rational2
1/5 + 1/4
rational1.doit() == rational2.doit()
True
Hi guys, I'm trying to plot z = 0 in 3D (just a plane on XY),
from sympy import symbols
from sympy.plotting import plot3d
x, y, z = symbols('x y z')
plot3d(0)but I'm getting:
In [14]: plot3d(0)
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
Cell In[14], line 1
----> 1 plot3d(0)
...
ValueError: Argument Z must be 2-dimensional.
Hello guys, I'm Atharv and I want to start with open source, and this seems like a great project to start with. I have read halfway through sympy docs, and also fully read the contribution guidelines, forked repo, and setup development env. I am familiar with git but not sure how people contribute to large-scale projects. I'm looking at good first issues and easy to fix but people seem to be asking to be assigned to the issue, do I have to be assigned to an issue? I'm really confused
1 reply