Sure!

tryton, and tryton related packages (especially the server side modules,
GNU Health, etc.) are numerous and complicated enough to deserve their
own separate file. You can put them in gnu/packages/tryton.scm.

For all practical purposes, I think it's best to assume that there is no
python3 genshi package. Instead, we should simply package
python2-genshi, and let the authors fix their python3 package. In any
case, tryton needs only python2-genshi. So, there is no urgent need for
the python3 genshi package. I guess, this also means that there will be
no python3 relatorio package.

>> > +    (arguments
>> > +     `(#:phases
>> > +       (modify-phases %standard-phases
>> > +         (add-before 'check 'preparations
>> > +                     (lambda* _

Since you're not using any of `lambda*' features, you can just use `lambda' here.

Actually, this is not a big deal. We'll leave it as it is. If necessary,
I'll fix it before pushing.

> diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
> index 57a67de41..f1ef53e1a 100644
> --- a/gnu/packages/python.scm
> +++ b/gnu/packages/python.scm
> @@ -14622,3 +14622,25 @@ substitute for redis.")
>
>  (define-public python2-fakeredis
>    (package-with-python2 python-fakeredis))
> +
> +(define-public python-sql
> +  (package
> +    (name "python-sql")
> +    (version "0.8")
> +    (source
> +     (origin
> +       (method url-fetch)

...

> +       (uri (pypi-uri
> +             "python-sql"
> +             version))

Could you put these on the same line?

> +    (propagated-inputs
> +     `(("lxml" ,python2-lxml)
> +       ("genshi" ,python2-genshi)))

Use full names here, including the python version in the package name. I
mean the full name of "lxml" is "python2-lxml", not "python-lxml". Make
similar changes wherever applicable.

Also, in several places, there was a typo saying "pyton" instead of
"python". Please fix those.

> * gnu/packages/python.scm (python-trytond, python2-trytond): New variables.

Change this commit message replacing python-trytond with trytond as
discussed earlier. Make a similar change for the commit message
involving python-tryton (the client).