pm.plot_rays(rays, env=env, width=900) does not work with arlpy

[ambrinherz]

Hello,

I was using arlpy during Sep. to Oct. last year (using python version 2x) and it was working fine. But I see that you made an update to the library in April. I installed alrpy and Acoustic Toolbox today and I have been trying to plot rays and arrivals but it does not work. I used a simple code as follows,

import arlpy.uwapm as pm import arlpy.plot as plt import numpy as np env = pm.create_env2d() rays = pm.compute_eigenrays(env, model='bellhop') pm.plot_rays(rays, env=env, width=900)

I get the below error.

[WARN] Bellhop did not generate expected output file Traceback (most recent call last): File "model.py", line 7, in pm.plot_rays(rays, env=env, width=900) File "/python/Plot_test/venv/lib/python3.8/site-packages/arlpy/uwapm.py", line 478, in plot_rays rays = rays.sort_values('bottom_bounces', ascending=False) AttributeError: 'NoneType' object has no attribute 'sort_values'

I looked up online and I understand that "NoneType" means no value is passed to sort_values and bellhop did not generate an output file to be passed to pm.plot_rays method. I am not sure if your recent update in April affected the arlpy library. Could you please check and help me.

I am using python version - 3.8.5 on Mac OSX. I installed arlpy using pip (pip install arlpy). Are there any dependencies that I should add for python version - 3.8.5 ? Could you please let me know. Appreciate your help.

[haozhao10]

Hi，friends. Do you know how to install Acoustic Toolbox of python version on Windows 10 ?

[mchitre]

@ambrinherz Check if your Bellhop installation is working OK. Run it on the command line and see what it says. Also, if you pass in a debug=True flag to pm.compute_eigenrays, it'll retain the Bellhop input/output files for you to manually check. See if there are any errors in it.

I've had a few cases of users on OS X not being able to run Bellhop correctly using the gfortran install for version 10+. I use gfortran 6.3.0 on OS X, and that works fine.

[mchitre]

@haozhao10 Please follow instructions on Acoustic Toolbox homepage on installing it. Then install Python support for it with pip install arlpy, and follow the instructions in the docs.

[ambrinherz]

Hello Mandar,

Thank you for the prompt response. I checked again and saw that bellhop.exe is on my PATH but when I run "bellhop.exe" from the command line it gives me a segmentation fault. I have GFortran version 9.1.0 installed. Do you have any idea about what causes segmentation fault? I tried adding debug=True flag but it does not create any input/output files for me. I get the same error as before. Please see the below screenshot. Appreciate your help.

Plot_test python model.py

[DEBUG] Model: bellhop

[WARN] Bellhop did not generate expected output file

[DEBUG] Bellhop working files: /var/folders/zl/x7khdv0s3ljg3bv_p8r2_y_h0000gn/T/tmp851srvsm.*

Traceback (most recent call last):

File "model.py", line 7, in

pm.plot_rays(rays, env=env, width=900)

File "/Users/ambrin/Desktop/python/Plot_test/venv/lib/python3.8/site-packages/arlpy/uwapm.py", line 478, in plot_rays

rays = rays.sort_values('bottom_bounces', ascending=False)

AttributeError: 'NoneType' object has no attribute 'sort_values'

On Sun, Aug 23, 2020 at 3:36 AM Mandar Chitre notifications@github.com wrote:

Check if your Bellhop installation is working OK. Run it on the command line and see what it says. Also, if you pass in a debug=True flag to pm.compute_eigenrays, it'll retain the Bellhop input/output files for you to manually check. See if there are any errors in it.

I've had a few cases of users on OS X not being able to run Bellhop correctly using the gfortran install for version 10+. I use gfortran 6.3.0 on OS X, and that works fine.

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/org-arl/arlpy/issues/50#issuecomment-678740964, or unsubscribe https://github.com/notifications/unsubscribe-auth/ALGONMNASRJLZMPD4DX5K3LSCDBJVANCNFSM4QGZB7GQ .

[mchitre]

The segmentation fault seems to be the culprit. I've seen this happen with gfortran 10, and fixed it by switching to gfortran 6.3.0. Since bellhop.exe comes from OALIB, there isn't anything arlpy about it. You might want to either use an older gfortran or get in touch with Bellhop's author to see how to resolve the problem.

[GT-OP]

Hello @mchitre sir actually i am bit confused about how to solve this gfortran problem can you help. Do i have to download it and add it to environment variables ? Can you help

[mchitre]

Yes, I believe you need gfortran libraries installed on your machine to run bellhop. I am not the author of bellhop, and so can't provide you support on installing and running it. arlpy provides a Python wrapper only, and you need a working copy of bellhop to use it.

P.S. You may want to look at https://github.com/org-arl/AcousticsToolbox.jl as a Julia alternative to arlpy, that I also maintain. That comes with pre-built binaries for bellhop for most systems, and might be easier to get started with, if you're having trouble installing bellhop from scratch.

[GT-OP]

Sure sir Thank you for the reply Regards

you commented.Message ID: @.***>

[GT-OP]

@mchitre sir can you share the files installed in your jupyter notebook or environment setup to run this bellhop code in jupyter notebook.

[GT-OP]

@mchitre sir if it is possible. Can you upload a video on youtube on how to set up bellhop channel in python from scratch (Gfortran too) because there isn't any resources available to it. It will be really helpful if it could be done

[mchitre]

I'm sorry @GT-OP, I cannot provide support to install bellhop.exe, which is NOT part of arlpy. You need a working install of that to use this package. You may ask the author of bellhop for help, if you wish to.