230 lines
6.0 KiB
Prolog
230 lines
6.0 KiB
Prolog
%%% -*- Mode: Prolog; -*-
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% Author: Vitor Santos Costa
|
|
% E-mail: vsc@dcc.fc.up.pt
|
|
% Copyright (C): Universidade do Porto
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%
|
|
% This file is part of the YAP Python Interface
|
|
% distributed according to Perl Artistic License
|
|
% check LICENSE file for distribution license
|
|
%
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
|
/** <module> python
|
|
|
|
A C-based Prolog interface to python.
|
|
|
|
@author Vitor Santos Costa
|
|
@version 0:0:5, 2012/10/8
|
|
@license Perl Artistic License
|
|
|
|
*/
|
|
|
|
%%%
|
|
|
|
:- module(python, [
|
|
init_python/0,
|
|
end_python/0,
|
|
python_command/1,
|
|
python_assign/3,
|
|
python_import/1,
|
|
python/2,
|
|
op(100,fy,$),
|
|
op(950,fy,:=),
|
|
op(950,yfx,:=),
|
|
(:=)/2,
|
|
(:=)/1
|
|
]).
|
|
|
|
|
|
/************************************************************************************************************
|
|
|
|
Python interface
|
|
|
|
Data types are
|
|
|
|
Python Prolog
|
|
string atoms
|
|
numbers numbers
|
|
lists lists
|
|
tuples t(...)
|
|
generic objs __pointer__(Address)
|
|
|
|
$var refers to the attribute __main__.var
|
|
|
|
*************************************************************************************************************/
|
|
|
|
:- use_module(library(shlib)).
|
|
:- use_module(library(lists)).
|
|
:- use_module(library(apply_macros)).
|
|
:- use_module(library(charsio)).
|
|
:- dynamic python_mref_cache/2, python_obj_cache/2.
|
|
|
|
:= F :- python(F,_).
|
|
|
|
V := F :- var(V), !, python(F,V).
|
|
A := F :- python(F, F1), python_assign(A, F1).
|
|
|
|
python_import(Module) :-
|
|
python_do_import(Module, _).
|
|
|
|
python_do_import(Module, MRef) :-
|
|
python_mref_cache(Module, MRef), !.
|
|
python_do_import(Module, MRef) :-
|
|
python_import(Module, MRef),
|
|
assert( python_mref_cache(Module, MRef) ).
|
|
|
|
fetch_module(M:E, M1, E1, MRef) :-
|
|
atom(M),
|
|
python_import(M, MRef0),
|
|
module_extend(M, E, M1, E1, MRef0, MRef).
|
|
|
|
%
|
|
% extend the module as much as we can.
|
|
%
|
|
module_extend(M0, M:E, MF, EF, _MRef0, MRef) :-
|
|
atom(M),
|
|
atom_concat([M0,'.',M], MM),
|
|
python_import(MM, MRef1), !,
|
|
module_extend(MM, E, MF, EF, MRef1, MRef).
|
|
module_extend(M, E, M, E, MRef, MRef).
|
|
|
|
object_prefix('__obj__'(_)).
|
|
object_prefix('$'(_)).
|
|
object_prefix('__obj__'(_):_).
|
|
object_prefix('$'(_):_).
|
|
|
|
% from an exp take an object, and its corresponding Prolog representation
|
|
descend_exp(V, _Obj, _F, _S) :-
|
|
var(V), !,
|
|
throw(error(instantiation_error,_)).
|
|
descend_exp(Exp, Obj, F, S) :-
|
|
object_prefix(Exp),
|
|
!,
|
|
python_field(Exp, Obj, F, S).
|
|
descend_exp(Exp, Obj, F, S) :-
|
|
python_mref_cache(_, MObj),
|
|
python_field(MObj:Exp, Obj, F, S), !.
|
|
descend_exp(Mod:Exp, Obj, F, S) :-
|
|
atom(Mod),
|
|
python_import(Mod, MObj),
|
|
python_field(MObj:Exp, Obj, F, S), !.
|
|
|
|
python_class(Obj) :-
|
|
python_obj_cache(inspect:isclass(_), F),
|
|
python_apply(F, isclass(Obj), {}, true).
|
|
|
|
process_obj(Obj, _, S, Obj, NS, Dict) :-
|
|
python_callable(Obj), !,
|
|
python_check_args(S, NS, Dict).
|
|
process_obj(Obj, _, S, FObj, NS, Dict) :-
|
|
python_class(Obj),
|
|
descend_object(Obj:'__init__', FObj, _, _),
|
|
python_check_args(S, NS, Dict).
|
|
|
|
python_eval_term(Obj, Obj) :-
|
|
var(Obj), !.
|
|
python_eval_term('__obj__'(Obj), '__obj__'(Obj)) :- !.
|
|
python_eval_term($Name, Obj) :- !,
|
|
python_is($Name, Obj).
|
|
python_eval_term([H|T], [NH|NT]) :- !,
|
|
python_eval_term(H, NH),
|
|
python_eval_term(T, NT).
|
|
python_eval_term(N, N) :- atomic(N), !.
|
|
python_eval_term(Exp, O) :-
|
|
descend_exp(Exp, Obj, _Old, S), !,
|
|
(functor(S, _, 0) ->
|
|
O = Obj
|
|
;
|
|
python_check_args(S, NS, Dict),
|
|
python_apply(Obj, NS, Dict, O)
|
|
).
|
|
python_eval_term(S, O) :-
|
|
python_check_args(S, NS, {}),
|
|
python_is(NS, O).
|
|
|
|
python_check_args(Exp, t, {}) :-
|
|
Exp =.. [_,V], var(V), !.
|
|
python_check_args(Exp, NExp, Dict) :-
|
|
functor(Exp, _, Arity),
|
|
arg(Arity, Exp, A), nonvar(A), A = (_=_), !,
|
|
Exp =.. [_F|LArgs],
|
|
match_args(LArgs, NLArgs, Dict),
|
|
NExp =.. [t|NLArgs].
|
|
python_check_args(Exp, NExp, {}) :-
|
|
Exp =.. [F|L],
|
|
maplist(python_eval_term, L, LF),
|
|
NExp =.. [F|LF].
|
|
|
|
% in case it is __init__ from __new__
|
|
splice_class(Ref, Ref, ArgNames, ArgNames) :- !.
|
|
splice_class(_FRef, _Ref, [_|ArgNames], ArgNames).
|
|
|
|
match_args([], [], {}).
|
|
match_args([V=A|LArgs], [], Dict) :- !,
|
|
match_named_args([V=A|LArgs], Map),
|
|
map_to_dict(Map, Dict).
|
|
match_args([A|LArgs], [VA|NLArgs], Dict) :-
|
|
python_eval_term(A, VA),
|
|
match_args(LArgs, NLArgs, Dict).
|
|
|
|
match_named_args([], []).
|
|
match_named_args([K=A|LArgs], [K=VA|Map]) :-
|
|
python_eval_term(A, VA),
|
|
match_named_args(LArgs, Map).
|
|
|
|
|
|
map_to_dict([X=V], {X:V}) :- !.
|
|
map_to_dict([X=V|Map], {X:V,NDict}) :-
|
|
map_to_dict(Map, {NDict}).
|
|
|
|
match_from_anames([K|_ArgNames], K, VA, [_|Defaults], [VA|Defaults]) :- !.
|
|
match_from_anames([_|ArgNames], K, VA, [V|Defaults], [V|NDefaults]) :-
|
|
match_from_anames(ArgNames, K, VA, Defaults, NDefaults).
|
|
|
|
fetch_args(FRef, Args, Kwd, Defaults) :-
|
|
FRef = '__obj__'(_), !,
|
|
%python_mref_cache('inspect', M),
|
|
python_obj_cache(inspect:getargspec(_), F),
|
|
python_apply(F, getargspec(FRef), {}, ExtraArgs),
|
|
ExtraArgs=t(Args, _, Kwd, Defaults).
|
|
fetch_args(_, []).
|
|
|
|
|
|
python(Obj, Out) :-
|
|
python_eval_term(Obj, Out).
|
|
|
|
python_command(Cmd) :-
|
|
python_run_command(Cmd).
|
|
|
|
start_python :-
|
|
init_python,
|
|
python_main_module(MRef),
|
|
assert(python_mref_cache('__main__', MRef)),
|
|
python_command('import sys'),
|
|
python_import('inspect'),
|
|
python_mref_cache(inspect, InspRef),
|
|
python_field(InspRef:isclass(_), IsClass, _, _),
|
|
assert(python_obj_cache(inspect:isclass(_), IsClass)),
|
|
python_field(InspRef:getargspec(_), GetArgSpec, _, _),
|
|
assert(python_obj_cache(inspect:getargspec(_), GetArgSpec)),
|
|
at_halt(end_python).
|
|
|
|
add_cwd_to_python :-
|
|
unix(getcwd(Dir)),
|
|
atom_concat(['sys.path.append(\"',Dir,'\")'], Command),
|
|
python_command(Command),
|
|
python_command("sys.argv = [\"yap\"]").
|
|
% done
|
|
|
|
python_assign(Name, Exp, '$'(Name)) :-
|
|
python_assign(Name, Exp).
|
|
|
|
:- initialization( use_foreign_library(foreign(python)), now ).
|
|
|
|
:- initialization(start_python, now).
|
|
|
|
:- initialization(add_cwd_to_python).
|
|
|