BUG: empymod : cannot import name 'ffht' from 'empymod.transform'

[jc-barreto]

Hello,

I'm installing SimPEGEM1D on a different computer and I have to say, I have installed a few times, and is always different. I have it working in another machine, and I have tried to create an env with a requirements.txt file that I saved from the working machine(

conda create --name simpegem1d --file requirements.txt

) but didn't work since not all packages could be found in conda.

So, I tried separately:

• Install EM1D
• Install SimPEG 13.1
• Uninstall Scipy 1.5
• Install Scipy 1.3
• Uninstall empymod 2.0.3
• Install empymod 2.0.2 And still not working. There is some order in which the programs have to be installed? This is the error:

Here are the packages installed in two different machines, on the left doesn't work, on the right the one that runs fine.

[prisae]

From your screenshot it looks like it almost found no packages on conda at all - I excpect you only use the default channel. Could you try it again by using the channel conda-forge?

The easiest is to run the following (straight from https://conda-forge.org/):

conda config --add channels conda-forge
conda config --set channel_priority strict

and then you should be able to do conda create --name simpegem1d --file requirements.txt this again - there might still be a few packages that are not on conda, you can then install them from pip.

If the resolve takes too long try it with mamba...

conda install mamba
mamba create --name simpegem1d --file requirements.txt

(mamba is a drop-in replacement for conda, providing, amongst other, a much faster resolve).

Let us know how you get on!

[prisae]

Ah, but there is one more issue. The master branch of simpegEM1D is updated for empymod v2, but all the releases are not. So if you use a release you have to use empymod<2.0.

It might be best to install simpegEM1D from the master branch, but I am not sure about that. @sgkang will tell you!

[jc-barreto]

Yeah...I tried with the conda forge and just 4 packages weren't there, so I deleted them from my requirement file. But now gives a lot of incompatibility between packages versions.

In this list, the order matters? Install EM1D Install SimPEG 13.1 Uninstall Scipy 1.5 Install Scipy 1.3 Uninstall empymod 2.0.3 Install empymod 2.0.2

[jc-barreto]

Hello,

After a few tests, I realized that this is the order to install:

• Create empty env
• conda install -c conda-forge simpeg=0.13.1
• conda install -c conda-forge Scipy==1.3.2
• conda install jupyter notebook
• pip install SimPEGEM1D
• pip uninstall empymod
• conda install -c conda-forge empymod==1.10.6

Now, when I run, the error is no longer

cannot import name 'ffht' from 'empymod.transform'

but

ModuleNotFoundError: No module named 'SimPEG.Regularization'

I have run a notebook in this env with SimPEG 0.13.1 and works fine. Only SimPEGEM1D can't find this module.

[prisae]

This issue was fixed in simpegEM1D v0.0.17: https://github.com/simpeg/simpegEM1D/releases/tag/0.0.17

However, v0.0.17 does not seem to be on PyPi, but v0.0.17b0 and v0.0.18a0, so there seems to be something weird with the PyPi deployment.

Try this:

pip install simpegEM1D==v0.0.18a0

Then you will also need empymod>=2, so no need to uninstall empymod and install an older version.

There work underway to implement simpegEM1D into SimPEG, which will make this process easier in the future!

[prisae]

Correction, you will still need empymod<2.

As I said earlier, I would just install from master:

pip install git+https://github.com/simpeg/simpegEM1D@master

then these issues should be gone.

[jc-barreto]

@prisae Yeah, you're right, the way to make this works is only by git. I've installed in few minutes in 2 computers, Thank you. At least now I know, next time I won't try by PyPi :)