On 19 Apr 2007 00:37:36 -0700, Stou Sandalski <[EMAIL PROTECTED]>
wrote:
Hi,
I have a python library created by wrapping the C++ library using
Boost.Python, the problem is that the wrappers are not very
pythonic.... so I want to add some methods that do not exist in the C+
+ implementation, that would create a better Python interface.
For example to initialize the data in an object in the library one
must iterate through every point, setting a value for each
individually. That's the way it works in C++ but in python it would
be nice to instead just have one call that can receive a numpy array
or a tuple. I want to add a call like: setData(array) to the python
object, a call that does not exist in the C++ implementation and then
in the C++ wrappers actually use setData to iterate through the array
and set the values using the normal C++ method, say setValue(index,
value).
Something along the lines of this (initData is not in the constructor
on purpose) C++ object:
class Foo
{
public:
void initData(int size)
{
data = new float[size];
}; // Create the data array
void setValue(int index, float value) // Set given value
{
data[index] = value;
}
private:
float *data;
};
In python however I want to do this:
obj = foo()
ar = array([1,2,3,4,5], dtype=float)
foo.setData(ar)
Or even better:
ar = array([1,2,3,4,5], dtype=float)
obj = foo(ar)
And have it somehow call initData() and setValue() iteration inside
the C++ code of the wrapper. I've only used SWIG and don't really
know much about Boost, I am not even sure how to label what I am
trying to do.
Can this be done with Boost, without changing the C++ library?
Take a look on next link:
http://boost.org/libs/python/doc/tutorial/doc/html/python/techniques.html#python.extending_wrapped_objects_in_python
Regards,
Stou
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Roman Yakovenko
C++ Python language binding
http://www.language-binding.net/
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