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From: | david larsson |
Subject: | Re: python-on-guile |
Date: | Mon, 10 Feb 2020 13:13:30 +0100 |
On 2020-02-09 21:36, Stefan Israelsson Tampe wrote:
in sys that is On Sun, Feb 9, 2020 at 9:36 PM Stefan Israelsson Tampe <address@hidden> wrote:OKey, I changed the values from immutable lists to lists.
Great!
On Sun, Feb 9, 2020 at 9:27 PM Stefan Israelsson Tampe <address@hidden> wrote: Note that a lot of things are untested because I'm alone on the development.
Ok, I understand.I haven't been able to build a recent version, but if you can share some updated instructions, then I could perhaps help out with some occasional testing. I have only managed to build from the old commit fc0d7a9 by updating the current python-on-guile guix package locally.
netlib is not included, you can test to add the python module file to a (language python module) directory
What's been working for me so far is only (load "path/to/file.py") and (load-compiled "path/to/file.go").
(use-modules (a b c)) did not work for me, except to load modules already shipped with python-on-guile repo; (language python module python) etc.
I have recently added much more of the python stdlib aka 3.7 but not all. Not sure what you mean by .scm file and .py fle when it comes to base64 using that module in scheme gives scheme@(guile-user)> (b64decode (b64encode "abc")) $2 = b'abc' scheme@(guile-user)> (b64decode (b64encode #(1 2 3))) $3 = b'\x01\x02\x03' Which return a bytevector if you want a string back you need to interpret the bytevector back to a string
Im getting weird results when trying to output the base64 representation of a string, take btest.py:
#import sys import base64 def mybmethod(x): mybytes = bytes(x, "utf-8") encodedbytes = base64.b64encode(mybytes) myb64string = str(encodedbytes, "utf-8") return myb64string #print(myb64string) #mybmethod(sys.argv[1]) and assume btest.scm using it with: (add-to-load-path (dirname (current-filename))) (use-modules (language python module python)) (load "btest.py") (define-public (mybmethodscm cmdline) (display (mybmethod (cadr cmdline)))) With this it will not work to run the scheme file with guile -e mybmethodscm btest.scm dfasdfThe error I got indicated that btest.py uses the bytes procedure from within python-on-guile instead of from the python3 base64 lib:
-------------------In /home/user1/VirtualHome/src/code_guile/python-on-guile-test/btest.scm:
18:11 4 (mybmethodscm _) In btest.py: 10:584 3 (_ "dfasdf" . _) In oop/pf-objects.scm: 584:15 2 (create-object _ _) 567:11 1 (the-create-object _ _) In language/python/bytes.scm: 99:6 0 Exception thrown while printing backtrace: Unbound slot in object Error while printing exception.language/python/bytes.scm:99:6: Wrong number of arguments to #<procedure 7f2bab5d4560 at language/python/bytes.scm:92:0 (self) | (self s)>
------------------- For a moment though, I could run: guile -e mybmethodscm btest.scm dfasdf | rev | base64 -d | rev # gives: dfasdf which was also strange.
modules are a bit difficult as I use the guile module system and the python modules are different. So nested modules needs some work. The best is to test and see.
Ok, got it!
I will look into the sys thingies Regards Stefan On Sun, Feb 9, 2020 at 8:40 PM david larsson <address@hidden> wrote: 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 pythonAnd 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 canimportir as a usual mode asfrom a import *The documentation is for the macro framework that enables you toworkwith python classes and idioms like python iteration. Hope this helps /Stefan 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 thatmighthelp, and which isn't too advanced? All tips and suggestions appreciated! Best regards, David
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