Error when importing de

[natasa-pavlov]

Question❓

I'm having issues when I run the line from diffeqpy import de in Python 3.9.6 and with Julia 1.8.3. installed.

I get the following error:

>>> from diffeqpy import de
  Activating project at `~/.julia/environments/diffeqpy`
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/natasa/Library/Python/3.9/lib/python/site-packages/diffeqpy/de.py", line 5, in <module>
    de.jit = Main.seval("jit(x) = typeof(x).name.wrapper(ModelingToolkit.modelingtoolkitize(x), x.u0, x.tspan, x.p)") # kinda hackey
  File "/Users/natasa/.julia/packages/PythonCall/wXfah/src/jlwrap/any.jl", line 204, in __setattr__
    self._jl_callmethod($(pyjl_methodnum(pyjlany_setattr)), k, v)
AttributeError: Julia: cannot assign variables in other modules

Any feedback will be much appreciated!

[ChrisRackauckas]

Are you sure you're on the latest versions of the packages?

[HuynhTran0301]

I have the same problem. I use Python 3.9.13, but I have several versions of Julia, ranging from 1.8.x to 1.10.x. I have installed the latest version of diffeqpy. When I implemented the ode it did not have the issue. How could I fix it?

[ChrisRackauckas]

@LilithHafner can you look into this?

[LilithHafner]

I'm having trouble reproducing this issue. I've tried on MacOS 13.6.3 on apple silicon with Julia 1.10.3 and python 3.9.13, using diffeqpy version 2.4.1 and juliacall version 0.9.20. (I've also tried on Asahi linux with a variety over versions).

Would either of you be willing to report more detailed reproduction instructions?

Some useful things to know would be

• What python package manager you're using
• The versions of all installed python packages (e.g. pip freeze)
• The versions in the Julia project @diffeqpy (launch Julia, press ] to enter the Pkg prompt, enter activate @diffeqpy, enter st)

(@v1.10) pkg> activate @diffeqpy
  Activating project at `~/.julia/environments/diffeqpy`

(@diffeqpy) pkg> st
Status `~/.julia/environments/diffeqpy/Project.toml`
  [0c46a032] DifferentialEquations v7.13.0
  [961ee093] ModelingToolkit v9.15.0
  [6099a3de] PythonCall v0.9.20

I'll try to debug and fix this without reproducing it, but it would be much more effective if I can get the error to appear locally. Thanks!