C  , Python, Incompatible Types of Numbers
class_<std::vector<double> >("PyVecDouble")
                         .def(vector_indexing_suite<std::vector<double> >());

class_<std::vector<long> >("PyVecLong")
                         .def(vector_indexing_suite<std::vector<long> >());

def NumpyArrayToPyVecDouble(vec):
    n = len(vec)
    p_vec = jp.PyVecDouble()

    for i in xrange(0,n):
        p_vec.append(vec[i])

    return p_vec

def NumpyArrayToPyVecLong(vec):
    n = len(vec)
    p_vec = jp.PyVecLong()

    for i in xrange(0,n):
        p_vec.append(vec[i])

    return p_vec

example_array = np.array([1.1, 2.2, 3.3, 4.4])
example = NumpyArrayToPyVecDouble(double_array)

dates_array = np.array([01122011, 01062012, 01122012, 01062013])
dates = NumpyArrayToPyVecLong(dates_array)

TypeError: Attempting to append an invalid type