Mercurial > pytave
view pycall.cc @ 321:3afd890fff6d
Rewrite pyobject.cell, always return a cell array of the right size
* @pyobject/cell.m: Rewrite, ensuring return value is always a cell array
of the correct size. Add more %!tests.
author | Mike Miller <mtmiller@octave.org> |
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date | Thu, 11 Aug 2016 22:35:19 -0700 |
parents | 3e0decdf59b0 |
children | 15c20ab4b80a |
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/* Copyright (C) 2015-2016 Mike Miller This file is part of Pytave. Pytave is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Pytave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Pytave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #if defined (HAVE_CONFIG_H) # include <config.h> #endif #include <boost/python.hpp> #include <boost/python/numeric.hpp> #include <octave/oct.h> #include <octave/parse.h> #define PYTAVE_DO_DECLARE_SYMBOL #include "arrayobjectdefs.h" #include "exceptions.h" #include "octave_to_python.h" #include "python_to_octave.h" #include "pytave_utils.h" using namespace boost::python; DEFUN_DLD (pycall, args, nargout, "-*- texinfo -*-\n\ @deftypefn {} {} pycall (@var{func})\n\ @deftypefnx {} {@var{x} =} pycall (@var{func})\n\ @deftypefnx {} {@var{x} =} pycall (@var{func}, @var{arg1}, @var{arg2}, @dots{})\n\ Call a Python function or callable, passing Octave values as arguments.\n\ \n\ Examples:\n\ @example\n\ @group\n\ pycall (\"int\", 6)\n\ @result{} 6\n\ pycall (\"os.getuid\")\n\ @result{} ...\n\ pycall (\"math.sqrt\", 2)\n\ @result{} 1.4142\n\ @end group\n\ @end example\n\ \n\ If the callable has no return, and an lvalue is specified, it will be set\n\ to @code{None}. However, if no lvalue was specified, @code{ans} will not\n\ be set. For example:\n\ @example\n\ @group\n\ s = pyeval (\"set([1, 2])\");\n\ pycall (s.add, 3)\n\ \n\ r = pycall (s.add, 4)\n\ @result{} r = [pyobject ...]\n\ \n\ None\n\ \n\ @end group\n\ @end example\n\ \n\ @seealso{pyeval, pyexec}\n\ @end deftypefn") { octave_value_list retval; std::string id; int nargin = args.length (); if (nargin < 1) { print_usage (); return retval; } Py_Initialize (); pytave::init_exceptions (); numeric::array::set_module_and_type ("numpy", "ndarray"); _import_array (); try { object callable; pytave::get_object_from_python (args(0), callable); if (callable.is_none ()) error("pycall: FUNC must be a string or a Python reference"); PyObject *pyargs = PyTuple_New (nargin - 1); for (int i = 1; i < nargin; i++) { object arg; pytave::octvalue_to_pyobj (arg, args(i)); PyObject *obj = arg.ptr (); Py_INCREF (obj); PyTuple_SET_ITEM (pyargs, i - 1, obj); } PyObject *result = PyEval_CallObjectWithKeywords (callable.ptr (), pyargs, 0); object res = object (handle<PyObject> (result)); // Ensure reasonable "ans" behaviour, consistent with Python's "_". if (nargout > 0 || ! res.is_none ()) { octave_value val; pytave::pyobj_to_octvalue (val, res); retval(0) = val; } } catch (pytave::object_convert_exception const &) { error ("pyexec: error in return value type conversion"); } catch (pytave::value_convert_exception const &) { error ("pycall: error in argument type conversion"); } catch (error_already_set const &) { std::string message = pytave::fetch_exception_message (); error ("pycall: %s", message.c_str ()); } return retval; } /* %!assert (ischar (pycall ("os.getcwd"))) %!assert (isreal (pycall ("random.random"))) %!assert (pycall ("math.exp", 3), exp (3)) %!assert (pycall ("math.trunc", pi), fix (pi)) %!assert (pycall ("math.sqrt", 2), sqrt (2)) %!assert (pycall ("cmath.sqrt", 2j), sqrt (2j)) %!assert (pycall ("int", 10.2), 10) %!assert (isa (pycall ("object"), "pyobject")) %!assert (isa (pycall ("dict"), "pyobject")) %!assert (isa (pycall ("list"), "pyobject")) %!assert (isa (pycall ("tuple"), "pyobject")) ## Test argument type conversion of values into Python %!test %! pyexec (["def typename(x):\n" ... %! " s = type(x).__name__\n" ... %! " if s == 'long':\n" ... %! " return 'int'\n" ... %! " return s"]); %!assert (pycall ("typename", 0), "float") %!assert (pycall ("typename", pi), "float") %!assert (pycall ("typename", 2j), "complex") %!assert (pycall ("typename", int32 (0)), "int") %!assert (pycall ("typename", false), "bool") %!assert (pycall ("typename", true), "bool") %!assert (pycall ("typename", "Hello world"), "str") %!assert (pycall ("typename", char ([1, 2, 3])), "str") ## Test construction of sequence types from cell arrays %!assert (char (pycall ("list")), "[]") %!assert (char (pycall ("list", {})), "[]") %!assert (char (pycall ("list", {1, 2, 3})), "[1.0, 2.0, 3.0]") %!assert (char (pycall ("list", {int8(1), int8(2), int8(3)})), "[1, 2, 3]") %!assert (char (pycall ("tuple")), "()") %!assert (char (pycall ("tuple", {})), "()") %!assert (char (pycall ("tuple", {1, 2, 3})), "(1.0, 2.0, 3.0)") %!assert (char (pycall ("tuple", {int8(1), int8(2), int8(3)})), "(1, 2, 3)") %!error (pycall ("list", {1, 2, 3; 4, 5, 6})) %!error (pycall ("dict", {1, 2, 3})) ## Test round trip type preservation / conversion %!test %! pyexec ("def roundtrip(x): return x"); %! values = { 0, pi, 2j, eps, false, true, version, "Hello world", ... %! [1, 2, 3], eye (4) }; %! for i = 1:numel (values) %! assert (pycall ("roundtrip", values{i}), values{i}); %! endfor ## Test conversion of integer types into Python %!assert (pycall (pyeval ("lambda x: type(x) == type(0) and x == 0"), int8 (0))) %!assert (pycall (pyeval ("lambda x: type(x) == type(0) and x == -2**7 "), intmin ("int8"))) %!assert (pycall (pyeval ("lambda x: type(x) == type(0) and x == 2**7 -1"), intmax ("int8"))) %!assert (pycall (pyeval ("lambda x: type(x) == type(0) and x == 0"), intmin ("uint8"))) %!assert (pycall (pyeval ("lambda x: type(x) == type(0) and x == 2**8 -1"), intmax ("uint8"))) %!assert (pycall (pyeval ("lambda x: type(x) == type(0) and x == 0"), int16 (0))) %!assert (pycall (pyeval ("lambda x: type(x) == type(0) and x == -2**15 "), intmin ("int16"))) %!assert (pycall (pyeval ("lambda x: type(x) == type(0) and x == 2**15-1"), intmax ("int16"))) %!assert (pycall (pyeval ("lambda x: type(x) == type(0) and x == 0"), intmin ("uint16"))) %!assert (pycall (pyeval ("lambda x: type(x) == type(0) and x == 2**16-1"), intmax ("uint16"))) %!assert (pycall (pyeval ("lambda x: type(x) == type(0) and x == 0"), int32 (0))) %!assert (pycall (pyeval ("lambda x: type(x) == type(0) and x == -2**31 "), intmin ("int32"))) %!assert (pycall (pyeval ("lambda x: type(x) == type(0) and x == 2**31-1"), intmax ("int32"))) %!assert (pycall (pyeval ("lambda x: type(x) == type(2**64) and x == 0"), intmin ("uint32"))) %!assert (pycall (pyeval ("lambda x: type(x) == type(2**64) and x == 2**32-1"), intmax ("uint32"))) %!assert (pycall (pyeval ("lambda x: type(x) == type(2**64) and x == 0"), int64 (0))) %!assert (pycall (pyeval ("lambda x: type(x) == type(2**64) and x == -2**63 "), intmin ("int64"))) %!assert (pycall (pyeval ("lambda x: type(x) == type(2**64) and x == 2**63-1"), intmax ("int64"))) %!assert (pycall (pyeval ("lambda x: type(x) == type(2**64) and x == 0"), intmin ("uint64"))) %!assert (pycall (pyeval ("lambda x: type(x) == type(2**64) and x == 2**64-1"), intmax ("uint64"))) %!error <argument type conversion> %! pyexec ("def intwrapper(x): return int(x)"); %! pycall ("intwrapper", ftp ()); %!test %! pyexec ("def pyfunc(x): return 2*x"); %! z = pycall ("pyfunc", [20 20]); %! assert (z, [40 40]) %!test %! pyexec (["def pyfunc(x):\n" ... %! " if x is True:\n return 30\n" ... %! " elif x is False:\n return 20\n" ... %! " else:\n return 10"]); %! assert (pycall ("pyfunc", true), 30) %! assert (pycall ("pyfunc", false), 20) %! assert (pycall ("pyfunc", 10), 10) %!error <NameError> %! pyexec ("def raiseException(): raise NameError('oops')") %! pycall ("raiseException") ## None as a return value %!test %! f = pyeval ("lambda: None"); %! r = pycall (f); %! is_none = pyeval ("lambda x: x is None"); %! assert (is_none (r)) ## But returning None will not set "ans" %!test %! f = pyeval ("lambda: None"); %! clear ans %! pycall (f); %! assert (! exist ("ans", "var")) */