Mercurial > pytave
view @pyobject/fieldnames.m @ 249:b1f874a68e0f
Add pyobject fieldnames and struct methods (fixes issue #33)
* @pyobject/fieldnames.m: New method to return public data properties
of a Python object.
* @pyobject/struct.m: New method to construct a struct with values copied
from the public properties of a Python object.
author | Mike Miller <mtmiller@octave.org> |
---|---|
date | Wed, 27 Jul 2016 19:18:54 -0700 |
parents | |
children | 6c133bcac33a |
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## Copyright (C) 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. ## ## This software 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 this software; see the file COPYING. ## If not, see <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @documentencoding UTF-8 ## @defmethod @@pyobject fieldnames (@var{x}) ## List the properties of a Python object. ## ## Returns a cell array of strings containing the names of the properties ## of @var{x}. ## ## Example: ## @example ## @group ## pyexec ("import sys") ## sys = pyeval ("sys"); ## fieldnames (sys) ## @result{} ans = ## @{ ## [1,1] = ... ## [2,1] = ... ## ... = path ## ... = version ## ... ## @} ## @end group ## @end example ## ## @seealso{fieldnames, @@pyobject/methods} ## @end defmethod function names = fieldnames (x) cmd = sprintf (["[a for x in (__InOct__['%s'],) for a in dir(x) " ... " if not callable(getattr(x, a))" ... " and not isinstance(getattr(x, a), __import__('types').ModuleType)" ... " and not a.startswith('_')]"], getid (x)); # FIXME: may need to convert from Python list to Octave cell array names = pyeval (cmd); names = names(:); endfunction %!test %! sys = pycall ("__import__", "sys"); %! lst = fieldnames (sys); %! assert (iscell (lst)) %! assert (length (lst) >= 32) %! assert (any (strcmp (lst, "path"))) %! assert (any (strcmp (lst, "prefix"))) %! assert (any (strcmp (lst, "stderr"))) %! assert (any (strcmp (lst, "stdin"))) %! assert (any (strcmp (lst, "stdout"))) %! assert (any (strcmp (lst, "version"))) %!test %! lst = fieldnames (pyeval ("__builtins__")); %! assert (any (strcmp (lst, "False"))) %! assert (any (strcmp (lst, "None"))) %! assert (any (strcmp (lst, "True")))