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Re: python-on-guile

From: david larsson
Subject: Re: python-on-guile
Date: Sun, 09 Feb 2020 20:39:48 +0100

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I am using the guix package python-on-guile 0.1.0-3.00a51a2 - maybe thats outdated?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 --output=python-test.go --from=python

and contains simple things, like:

    a = s + 1
    return a

but if I add statements to 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.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 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,

On 2020-02-09 18:59, Stefan Israelsson Tampe wrote:
I'm the author of that lib.


The main bindings are reachable through (language python module

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


If you write a module and place it in a/b/
you can use the classes and functions theirin by

(use-modules (a b c))

you can load a .py file as (i hope this work)
  (load "")

If you place a module in (language python module 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

On Sun, Feb 9, 2020 at 6:31 PM david larsson
<address@hidden> 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,

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