ConversionCheck fromPy( PyObject *, double&);
ConversionCheck fromPy( PyObject *, std::string&);
ConversionCheck fromPy( PyObject *, PyObject *&);
ConversionCheck fromPy( PyObject *, double&);
ConversionCheck fromPy( PyObject *, std::string&);
ConversionCheck fromPy( PyObject *, PyObject *&);