Function pause

include/matplotlibcpp.h:2152–2164

template<typename Numeric>
inline void pause(Numeric interval)
{
    detail::_interpreter::get();

    PyObject* args = PyTuple_New(1);
    PyTuple_SetItem(args, 0, PyFloat_FromDouble(interval));

    PyObject* res = PyObject_CallObject(detail::_interpreter::get().s_python_function_pause, args);
    if(!res) throw std::runtime_error("Call to pause() failed.");

    Py_DECREF(args);
    Py_DECREF(res);
}

inline void save(const std::string& filename)
{