[C++-sig] call C-functions (by reference) from Python (using Boost.Python)

[Lutz Lauterbach]

Roman Yakovenko <roman.yakovenko <at> gmail.com> writes:

> Take a look on fixed_input_array or fixed_output_array function within
> a file I attached previously in this thread. You can find implementation of
> helper functions here: http://tinyurl.com/ydpjak
>

... I took your suggestion and inserted the file "convenience.pypp.hpp" in my 
program and also copied some Boost-code from your other example (concerning 
fixed_input_array/fixed_output_array). During compilation it brings (only) two 
error messages:

convenience.pypp.hpp: In function `void 
pyplusplus::convenience::ensure_uniform_sequence(boost::python::api::object, pyp
lusplus::convenience::index_type)':
convenience.pypp.hpp:43: error: `len' is not a member of `boost::python'
convenience.pypp.hpp: In function `void pyplusplus::convenience::copy_sequence
(const boost::python::api::object&, Inserter)':
convenience.pypp.hpp:73: error: `len' is not a member of `boost::python'

This seems to be a rather basic problem, I do not see any missing include file 
since I "#include <boost/python.hpp>", but I have no clue. Do you know the 
reason?