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""" Attribute and method access on Python objects from C++.
Note: std::cout type operations currently crash python...
Not sure what is up with this...
"""
from __future__ import absolute_import, print_function
import scipy.weave as weave
#----------------------------------------------------------------------------
# get/set attribute and call methods example
#----------------------------------------------------------------------------
class Foo(object):
def __init__(self):
self.val = 1
def inc(self,amount):
self.val += amount
return self.val
obj = Foo()
code = """
py::tuple result(3);
int i = obj.attr("val");
result[0] = i;
py::tuple args(1);
args[0] = 2;
i = obj.mcall("inc",args);
result[1] = i;
obj.set_attr("val",5);
i = obj.attr("val");
result[2] = i;
return_val = result;
"""
print('initial, inc(2), set(5)/get:', weave.inline(code,['obj']))
#----------------------------------------------------------------------------
# indexing of values.
#----------------------------------------------------------------------------
from UserList import UserList
obj = UserList([1,[1,2],"hello"])
code = """
int i;
// find obj length and access each of its items
//std::cout << "UserList items: ";
//for(i = 0; i < obj.length(); i++)
// std::cout << obj[i].str() << " ";
//std::cout << std::endl;
// assign new values to each of its items
for(i = 0; i < obj.length(); i++)
obj[i] = "goodbye";
"""
weave.inline(code,['obj'])
print("obj with new values:", obj)
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