As of Jul 2023: Problems Installing Lpy binaries using Conda

[deltayoung]

I'm trying to install lpy using conda on one existing environment conda install openalea.lpy -c fredboudon -c conda-forge and one new environment: conda create -n lpy openalea.lpy -c fredboudon -c conda-forge

For the existing environment, strangely after installation and calling "lpy", there is nothing happening. However, for the new environment, "lpy" works and the visual lpy editor appear. What did I do wrong for the existing environment?

[deltayoung]

i didn't manage to troubleshoot the existing environment, but moved on with the new environment that works just fine.

[wanghanruibaba]

lpy在cmd里面调用吗？我安装installration里面的提示，但是在调用lpy没有反应

[pradal]

Translation : Is lpy called inside cmd? I installed the prompts inside installration, but there is no response in calling lpy!

[blacall]

Bumping this issue.

Calling lpy does nothing.

Using Anaconda Prompt (Windows x64), my installation process was:

git clone https://github.com/openalea/lpy.git conda create -n lpy openalea.lpy -c fredboudon -c conda-forge conda activate lpy

Typing lpy into the terminal does nothing. Any tips?

[pradal]

Thanks for testing it. Could you try to get LPy from the openalea repository?

conda create -n testlpy -c openalea3 -c conda-forge openalea.lpy

Then, type in the Anaconda prompt

conda activate testlpy
lpy

[blacall]

@pradal Thank you for the quick response!

I've tried what you mentioned and calling lpy still does not open any GUI in the testlpy conda environment.

Not sure if this is helpful, but I have also tried creating the cauliflower conda environment (from this repository) and calling lpy also does not work in there.

Here is the output from my conda info:

active env location : C:\Users\Kevin\miniconda3\envs\testlpy
shell level : 2
user config file : C:\Users\Kevin\.condarc
populated config files : C:\Users\Kevin\miniconda3\.condarc
conda version : 25.3.1
conda-build version : not installed
solver : libmamba (default)
virtual packages : __archspec=1=skylake
                          __conda=25.3.1=0
                          __cuda=12.8=0
                          __win=10.0.26100=0
base environment : C:\Users\Kevin\miniconda3  (writable)
conda av data dir : C:\Users\Kevin\miniconda3\etc\conda
conda av metadata url : None
channel URLs : https://repo.anaconda.com/pkgs/main/win-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/r/win-64
                          https://repo.anaconda.com/pkgs/r/noarch
                          https://repo.anaconda.com/pkgs/msys2/win-64
                          https://repo.anaconda.com/pkgs/msys2/noarch
package cache : C:\Users\Kevin\miniconda3\pkgs
                          C:\Users\Kevin\.conda\pkgs
                          C:\Users\Kevin\AppData\Local\conda\conda\pkgs
envs directories : C:\Users\Kevin\miniconda3\envs
                          C:\Users\Kevin\.conda\envs
                          C:\Users\Kevin\AppData\Local\conda\conda\envs
platform : win-64
user-agent : conda/25.3.1 requests/2.32.3 CPython/3.13.2 Windows/11 Windows/10.0.26100 solver/libmamba conda-libmamba-solver/25.4.0 libmambapy/2.0.5 aau/0.7.0 c/. s/. e/.
administrator : True
netrc file : None
offline mode : False

[pradal]

Could you run in your just created environment

python -c 'from openalea.lpy.gui.lpystudio import main; main()'

And see if there is an error?

[blacall]

Here is the error it encountered:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\Kevin\miniconda3\envs\testlpy\Lib\site-packages\OpenAlea.Lpy-3.14.1-py3.12.egg\openalea\lpy\__init__.py", line 2, in <module>
    from .__lpy_kernel__ import *
ImportError: DLL load failed while importing __lpy_kernel__: The specified module could not be found.

[pradal]

Great. We are currently planning a release. When we will release LPy, we will ask you to test it again.

[baugetfa]

For the record:

• on Linux and windows 8 the command lpy launches the main window, after the following installation:
• also tried ipython with success, the tree being displayed on 3D viewer, as follow:

from openalea.lpy import *
lsystem = Lsystem("massart.lpy")
for lstring in lsystem:
    lsystem.plot(lstring)

With massart.lpy from the tutorials of the lpy documention.