Re: [PATCH 4/7] python/qemu: Add pipenv support

[Vladimir Sementsov-Ogievskiy]

03.06.2020 03:15, John Snow wrote:
> pipenv is a tool used for managing virtual environments with precisely
> specified dependencies. It is separate from the dependencies listed in
> setup.py, which are (by 'best practices') not supposed to be pinned.
>
> Note that pipenv is not required to install or use this module; this is
> just a convenience for in-tree developing.
>
> Here, a "blank" pipfile is added with no dependencies, but specifies
> Python 3.6 for the virtual environment.
>
> Pipfile will specify our version minimums, while Pipfile.lock specifies
> an exact loudout of packages that were known to operate correctly. This
> latter file provides the real value for easy setup of container images
> and CI environments.
>
> Signed-off-by: John Snow <jsnow@redhat.com>
> ---
>   python/Pipfile | 11 +++++++++++
>   1 file changed, 11 insertions(+)
>   create mode 100644 python/Pipfile
>
> diff --git a/python/Pipfile b/python/Pipfile
> new file mode 100644
> index 00000000000..9534830b5eb
> --- /dev/null
> +++ b/python/Pipfile
> @@ -0,0 +1,11 @@
> +[[source]]
> +name = "pypi"
> +url = "https://pypi.org/simple";
> +verify_ssl = true
> +
> +[dev-packages]
> +
> +[packages]
> +
> +[requires]
> +python_version = "3.6"

Should it be >= or something like this?

And, how should I use this all?

My failed attempt:
[root@kvm python]# pipenv install --python /usr/bin/python3
Virtualenv already exists!
Removing existing virtualenv…
Creating a virtualenv for this project…
Pipfile: /work/src/qemu/john-python-installable/python/Pipfile
Using /usr/bin/python3 (3.7.5) to create virtualenv…
⠹ Creating virtual environment...created virtual environment 
CPython3.7.5.final.0-64 in 112ms
  creator CPython3Posix(dest=/root/.local/share/virtualenvs/python-4FwBBPCc, 
clear=False, global=False)
  seeder FromAppData(download=False, pip=latest, setuptools=latest, 
wheel=latest, via=copy, 
app_data_dir=/root/.local/share/virtualenv/seed-app-data/v1.0.1)
  activators 
BashActivator,CShellActivator,FishActivator,PowerShellActivator,PythonActivator,XonshActivator

✔ Successfully created virtual environment!
Virtualenv location: /root/.local/share/virtualenvs/python-4FwBBPCc
Warning: Your Pipfile requires python_version 3.6, but you are using 3.7.5 
(/root/.local/share/v/p/bin/python).
  $ pipenv --rm and rebuilding the virtual environment may resolve the issue.
  $ pipenv check will surely fail.
Installing dependencies from Pipfile.lock (44d7bd)…
  🐍   ▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉ 0/0 — 00:00:00
To activate this project's virtualenv, run pipenv shell.
Alternatively, run a command inside the virtualenv with pipenv run.
[root@kvm python]# pipenv shell
Warning: Your Pipfile requires python_version 3.6, but you are using 3.7.5 
(/root/.local/share/v/p/bin/python).
  $ pipenv --rm and rebuilding the virtual environment may resolve the issue.
  $ pipenv check will surely fail.
Launching subshell in virtual environment…
 . /root/.local/share/virtualenvs/python-4FwBBPCc/bin/activate
[root@kvm work]#  . /root/.local/share/virtualenvs/python-4FwBBPCc/bin/activate
(python) [root@kvm work]# python
Python 3.7.5 (default, Oct 17 2019, 12:09:47)
[GCC 9.2.1 20190827 (Red Hat 9.2.1-1)] on linux
Type "help", "copyright", "credits" or "license" for more information.
> > > import pylint
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'pylint'
> > >

and iotest 297 says: "pylint-3 not found"

(honestly, I'm new to using python virtual environment)

--
Best regards,
Vladimir