Problem setting up the playground for Fortran (Python installation)

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1

This question does not concern Fortran per se but the GSoC project on creating a interactive playground for Fortran (see: GitHub - fortran-lang/playground: An interactive Fortran playground).

I am trying to get it working on Windows via an Unbuntu WSL installation. I have Python 3.8.10 installed and various other things, but for reasons I cannot fathom the command “pipenv install” fails. It complains about a missing module “virtualenv.seed.via_app_data” (yesterday there was a different message, a missing package “pipenv.pew”, if I remember correctly). “pipenv” and “virtualenv” have been installed, apparently correctly. I have looked at it together with @ashirrwad, but we made no progress.

@milancurcic, @everythingfunctional and @ashirrwad have been able to get it working, but they use a proper Linux system. Unfortunately, I do not have access to such a system, at least not one where I can install stuff at will.

Any help is appreciated, as it would be so nice to be able to experiment with this playground. (Note: in the near future this ought to be solved by the playground running on a webserver, but now it has to run locally)

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2

Sir , I had faced a similar problem for my college project 1 year back that time I had used this to get it to work. you may try it, not sure if this works now.
pip uninstall virtualenv
then pip install virtualenv==20.0.23
then try pipenv install .

Is Ubuntu WSL latest ? ( there had been a similar problem with debian also earlier)

Thanks and Regards,
Henil Shalin Panchal

3

Thanks! This solved the problem with pipenv indeed. The other steps in the start up procedure still cause me a problem, as I do not quite understand the relation with docker and the immediate error is “flask”, but at least I have moved forward a step.

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4

Sir, If you may copy paste the error, maybe I can resolve them, as I had worked with docker and flask earlier ( if I can be of any help).

Thanks and Regards,
Henil Shalin Panchal

5

Okay, but I first need to know if I should use the docker container to start it or my regular environment. I suspect the first, but the instructions are rather terse (not a complaint, @ashirrwad :slight_smile:) and clash with my limited understanding of the magic I am messing with.

6

flask will automatically start the docker image. No need to do it yourself, hence why it is not listed as a step in the README.

7

Ah, but the problem is that flask is not recognised as a command or program. So there I get stuck.

8

Okay, now that pipenv is working, I could get flask installed properly. Now the problem boils down to:

$ pipenv run flask run
Traceback (most recent call last):
  File "/home/markus/.local/share/virtualenvs/Backend-qjk8AQVR/bin/flask", line 8, in <module>
    sys.exit(main())
... (lots of stuff omitted)
    self._version = self._retrieve_server_version()
  File "/home/markus/.local/share/virtualenvs/Backend-qjk8AQVR/lib/python3.8/site-packages/docker/api/client.py", line 221, in _retrieve_server_version
    raise DockerException(
docker.errors.DockerException: Error while fetching server API version: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))

So, again a few steps forward :slight_smile:

9

Sir, this can be resolved by :

for WSL (Windows Subsystem for Linux) we need to enable ‘WSL Integration’ for required distro in Windows Docker Desktop (Settings → Resources-> WSL Integration → Enable integration with required distros).

then reload docker then turn docker off then turn it on.

10

It took me a while to find the settings in the Docker Desktop (it is the little gear icon), but with the information I found on the Internet and the information in the Docker application, I also understand that I need WSL 2 for this to work.

As far as I understand, WSL 2 does not work in my environment, because of the Windows 10 version we use. That means this is the end of what I can try.

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