ModuleNotFoundError: No module named 'lightfm._lightfm_fast_no_openmp' Docker usage fails on macOS:

Nobody has claimed this yet.

I have exact same issue as #211 (and I can't reopen it)
But I use latest version of repo (and Dockerfile)

I just followed the [instructions](https://making.lyst.com/lightfm/docs/home.html?highlight=docker#using-with-docker):

```sh
git clone git@github.com:lyst/lightfm.git && cd lightfm
docker-compose build lightfm
docker-compose run lightfm py.test -x lightfm/tests/
```

then I got this error:
```
~/Desktop/lightfm
docker-compose run lightfm py.test -x lightfm/tests/
=========================================================== test session starts ============================================================
platform linux -- Python 3.7.7, pytest-5.4.3, py-1.9.0, pluggy-0.13.1
rootdir: /home/lightfm
collected 0 items / 1 error

================================================================== ERRORS ==================================================================
____________________________________________________ ERROR collecting tests/test_api.py ____________________________________________________
ImportError while importing test module '/home/lightfm/tests/test_api.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
lightfm/lightfm/__init__.py:2: in
__LIGHTFM_SETUP__
E NameError: name '__LIGHTFM_SETUP__' is not defined

During handling of the above exception, another exception occurred:
lightfm/lightfm/_lightfm_fast.py:3: in
from ._lightfm_fast_openmp import * # NOQA
E ModuleNotFoundError: No module named 'lightfm._lightfm_fast_openmp'

During handling of the above exception, another exception occurred:
lightfm/tests/test_api.py:7: in
from lightfm.lightfm import LightFM
lightfm/lightfm/__init__.py:4: in
from .lightfm import LightFM
lightfm/lightfm/lightfm.py:8: in
from ._lightfm_fast import (
lightfm/lightfm/_lightfm_fast.py:14: in
from ._lightfm_fast_no_openmp import * # NOQA
E ModuleNotFoundError: No module named 'lightfm._lightfm_fast_no_openmp'
============================================================= warnings summary =============================================================
lightfm/lightfm/_lightfm_fast.py:10
/home/lightfm/lightfm/_lightfm_fast.py:10: UserWarning: LightFM was compiled without OpenMP support. Only a single thread will be used.
"LightFM was compiled without OpenMP support. "

-- Docs: https://docs.pytest.org/en/latest/warnings.html
========================================================= short test summary info ==========================================================
ERROR lightfm/tests/test_api.py
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! stopping after 1 failures !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
======================================================= 1 warning, 1 error in 0.39s ========================================================
```

docker-compose build lightfm log

~/Desktop/lightfm

docker-compose build lightfm

Building lightfm

Step 1/10 : FROM ubuntu:16.04

 ---> c522ac0d6194

Step 2/10 : RUN apt-get update

 ---> Using cache

 ---> b64441cabfa6

Step 3/10 : RUN apt-get install -y libxml2 libxslt-dev wget bzip2 gcc

 ---> Using cache

 ---> 34e05995837b

Step 4/10 : RUN echo 'export PATH=/opt/conda/bin:$PATH' > /etc/profile.d/conda.sh &&     wget --quiet https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O ~/miniconda.sh &&     /bin/bash ~/miniconda.sh -b -p /opt/conda &&     rm ~/miniconda.sh

 ---> Using cache

 ---> ab459584d9f0

Step 5/10 : ENV PATH /opt/conda/bin:$PATH

 ---> Using cache

 ---> 2572771054cb

Step 6/10 : RUN conda install pytest jupyter scikit-learn

 ---> Using cache

 ---> 617daf37b1f1

Step 7/10 : ENV PYTHONDONTWRITEBYTECODE 1

 ---> Using cache

 ---> 884626f7f728

Step 8/10 : ADD . /home/lightfm/

 ---> 3ffc2c90de13

Step 9/10 : WORKDIR /home/

 ---> Running in 8158241109ab

Removing intermediate container 8158241109ab

 ---> 0f9fe63d6dd5

Step 10/10 : RUN cd lightfm && pip install -e .

 ---> Running in fd5cd5862536

Obtaining file:///home/lightfm

Requirement already satisfied: numpy in /opt/conda/lib/python3.7/site-packages (from lightfm==1.15) (1.18.5)

Requirement already satisfied: scipy>=0.17.0 in /opt/conda/lib/python3.7/site-packages (from lightfm==1.15) (1.5.0)

Requirement already satisfied: requests in /opt/conda/lib/python3.7/site-packages (from lightfm==1.15) (2.23.0)

Requirement already satisfied: scikit-learn in /opt/conda/lib/python3.7/site-packages (from lightfm==1.15) (0.23.1)

Requirement already satisfied: certifi>=2017.4.17 in /opt/conda/lib/python3.7/site-packages (from requests->lightfm==1.15) (2020.6.20)

Requirement already satisfied: chardet<4,>=3.0.2 in /opt/conda/lib/python3.7/site-packages (from requests->lightfm==1.15) (3.0.4)

Requirement already satisfied: idna<3,>=2.5 in /opt/conda/lib/python3.7/site-packages (from requests->lightfm==1.15) (2.9)

Requirement already satisfied: urllib3!=1.25.0,!=1.25.1,<1.26,>=1.21.1 in /opt/conda/lib/python3.7/site-packages (from requests->lightfm==1.15) (1.25.8)

Requirement already satisfied: joblib>=0.11 in /opt/conda/lib/python3.7/site-packages (from scikit-learn->lightfm==1.15) (0.16.0)

Requirement already satisfied: threadpoolctl>=2.0.0 in /opt/conda/lib/python3.7/site-packages (from scikit-learn->lightfm==1.15) (2.1.0)

Installing collected packages: lightfm

  Running setup.py develop for lightfm

Successfully installed lightfm

Removing intermediate container fd5cd5862536

 ---> 3ed973884559

Successfully built 3ed973884559

Successfully tagged lightfm_lightfm:latest

~/Desktop/lightfm

macOS Catalina 10.15.5 (19F101)
Macbook Pro 16-inch (A2141)
Docker 2.3.0.3 (45519)

Start by reproducing the documented docker-compose build and test commands, then inspect the Dockerfile installation step and lightfm/_lightfm_fast.py, which reports both missing native modules. Use lightfm/tests/ and the failing tests/test_api.py collection as the validation target; done means the container builds and the test suite no longer fails during module import.

Written by the indexing model from the issue text.