imprive python interface

This commit is contained in:
Vitor Santos Costa
2012-12-01 14:28:25 +00:00
parent 683032432c
commit 3c0e16030c
4 changed files with 335 additions and 120 deletions

View File

@@ -59,8 +59,7 @@ Data types are
:- use_module(library(lists)).
:- use_module(library(apply_macros)).
:- use_module(library(charsio)).
:- dynamic python_mref_cache/2.
:- dynamic python_mref_cache/2, python_obj_cache/2.
:= F :- python(F,_).
@@ -91,51 +90,127 @@ module_extend(M0, M:E, MF, EF, MRef0, MRef) :-
module_extend(MM, E, MF, EF, MRef1, MRef).
module_extend(M, E, M, E, MRef, MRef).
% given an object, detect its len method
python_eval_term(Expression, O) :-
fetch_module(Expression, Module, Exp, 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(Obj, Obj, S, NS, Dict).
process_obj(Obj, _, S, Obj, NS, Dict) :-
python_class(Obj),
descend_object(Obj:'__init__', FObj, _, _),
python_check_args(Obj, FObj, 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), !,
(
% avoid looking at : as field of module.
Exp = Obj:Field
python_function(Obj)
->
python_access(MRef, Exp, O)
python_check_args(Obj, Obj, S, NS, Dict),
python_apply(Ob, NS, Dict, O)
;
functor(Exp, F, _),
python_f(MRef, F, FRef),
python_check_args(FRef, Exp, NExp)
descend_exp(Obj:im_func, FObj, _, _)
->
python_apply(FRef, NExp, O)
;
python_access(MRef, Exp, O)
python_check_args(FObj, Obj, S, NS, Dict),
python_apply(Obj, NS, Dict, O)
;
descend_exp(Obj:'__init__':im_func, FObj, _, _)
->
python_check_args(FObj, Obj, S, NS, Dict),
python_apply(Obj, NS, Dict, O)
;
python_check_args('.', '.', S, NS, {}),
python_is(NS, O)
).
python_eval_term(Obj:Field, O) :- !,
python_access(Obj, Field, O).
python_eval_term(Obj, O) :-
python_is(Obj, O).
python_eval_term(S, O) :-
python_check_args('.', '.', S, NS, {}),
python_is(NS, O).
python_check_args(FRef, Exp, NExp) :-
python_check_args(_FRef, _Ref, Exp, t, {}) :-
Exp =.. [_,V], var(V), !.
python_check_args(FRef, Ref, Exp, NExp, Dict) :-
functor(Exp, _, Arity),
arg(Arity, Exp, _=_), !,
fetch_args(FRef, Dict),
Exp =.. [F|LArgs],
match_args(LArgs, Dict, NLArgs, _),
NExp =.. [F|NLArgs].
python_check_args(FRef, Exp, Exp).
arg(Arity, Exp, A), nonvar(A), A = (_=_), !,
fetch_args(FRef, ArgNames0, Kwd, Defaults),
Exp =.. [_F|LArgs],
Defaults =.. [t|DefsL],
splice_class(FRef, Ref, ArgNames0, ArgNames),
match_args(LArgs, ArgNames, DefsL, NLArgs, Dict),
NExp =.. [t|NLArgs].
python_check_args(FRef, _, Exp, NExp, {}) :-
Exp =.. [F|L],
maplist(python_eval_term, L, LF),
NExp =.. [F|LF].
fetch_args(FRef, Args) :-
python_import('inspect', M),
python_f(M, getargspec, F),
python_apply(F, getargspec(FRef), Args),
ExtraArgs=t(Args, _, _, _).
% in case it is __init__ from __new__
splice_class(Ref, Ref, ArgNames, ArgNames) :- !.
splice_class(_FRef, _Ref, [_|ArgNames], ArgNames).
match_args([], _ArgNames, _Defaults, [], {}).
match_args([V=A|LArgs], ArgNames, Defaults, NLArgs, Dict) :- !,
match_named_args([V=A|LArgs], ArgNames, Defaults, NLArgs, Map),
map_to_dict(Map, Dict).
match_args([A|LArgs], [_|ArgNames], [_|Defaults], [VA|NLArgs], Dict) :-
python_eval_term(A, VA),
match_args(LArgs, ArgNames, Defaults, NLArgs, Dict).
match_named_args([], _ArgNames, Defaults, Defaults, []).
match_named_args([K=A|LArgs], ArgNames, Defaults, NLArgs, Map) :-
match_from_anames(ArgNames, K, VA, Defaults, NDefaults), !,
python_eval_term(A, VA),
match_named_args(LArgs, ArgNames, NDefaults, NLArgs, Map).
match_named_args([K=A|LArgs], ArgNames, Defaults, NLArgs, [K=VA|Map]) :-
python_eval_term(A, VA),
match_named_args(LArgs, ArgNames, Defaults, NLArgs, Map).
match_args([], _, [], ok).
match_args([A=V|LArgs], Dict, [I=V|NLArgs], OK) :-
match_args(LArgs, Dict, NLArgs, ok), !,
( nth0(I, Dict, A) -> true ; throw(type_error(argument(A=V))) ).
match_args([A|LArgs], Dict, [A|NLArgs], not_ok) :-
match_args(LArgs, Dict, NLArgs, _).
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).
@@ -146,8 +221,15 @@ python_command(Cmd) :-
start_python :-
use_foreign_library(foreign(python)),
init_python,
python_main_module(MRef),
assert(python_mref_cache('__main__', MRef)),
python_command('import sys'),
python_command('import inspect').
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)).
add_cwd_to_python :-
unix(getcwd(Dir)),