Re: python-on-guile

[david larsson <david.larsson@selfhosted.xyz>]

Thanks for your explanations, but unfortunately I still can't figure out 
how to use this except in the simplest of cases.

I am using the guix package python-on-guile 0.1.0-3.00a51a2 - maybe 
thats outdated?


The simple things I have managed to do, are like:

   (add-to-load-path (dirname (current-filename)))
   (load-compiled python-test.go)

where python-test.go is compiled with:

   guild compile python-test.py --output=python-test.go --from=python

and contains simple things, like:

   f(s):
     a = s + 1
     return a

but if I add statements to python-test.py like:

   import netaddr
   def myfun(a)
     <something using netaddr>

(netaddr is a module installed via: pip3 install --user netaddr)

I receive an error about not finding the module.

I am able to add only the modules which exist in the python-on-guile 
repo, like:

   import sys
   import base64

but Im getting errors, for example Im not able to use things from sys, 
like:

   sys.path.append(<somepath>)
   sys.path.insert(0, <somepath>)

I was able to use some things from base64 but I only received weird 
results when converting between bytevectors and strings between the .scm 
file and .py file. What works fine using python3 python-test.py do not 
usually work when passing either a bytevector or string to the same 
go-compiled file from the .scm file using the python-code. Not sure 
whether there's a problem using python3 vs python2 here?

Essentially, what Im looking for is how to proceed if I want to use 
modules installed via the pip package manager from guile, and what paths 
and imports I need to make, and how I might need to wrap them correctly 
in the scheme and python files to invoke a pip package procedure from 
guile.


Best regards,
David

On 2020-02-09 18:59, Stefan Israelsson Tampe wrote:
> I'm the author of that lib.
> 
> 1)
> 
> The main bindings are reachable through (language python module
> python)
> 
> So you could now go ahead and do
>> (use-modules (language python module python))
>> ;L python
> 
> And you will get a python shell that works quite ok for one liners
> 
> 2)
> 
> If you write a module and place it in a/b/c.py
> you can use the classes and functions theirin by
> 
> (use-modules (a b c))
> 
> 3)
> you can load a .py file as (i hope this work)
>   (load "a.py")
> 
> 4)
> If you place a module in (language python module a.py) you can import
> ir as a usual mode as
>> from a import *
> 
> The documentation is for the macro framework that enables you to work
> with python classes and idioms like python iteration.
> 
> Hope this helps
> /Stefan
> 
> On Sun, Feb 9, 2020 at 6:31 PM david larsson
> <david.larsson@selfhosted.xyz> wrote:
> 
>> Hi everyone,
>> I am trying to wrap my head around how to use the python-on-guile
>> library, but Im struggling. Does anyone have example code that might
>> 
>> help, and which isn't too advanced?
>> 
>> All tips and suggestions appreciated!
>> 
>> Best regards,
>> David