var (
	EDOM   = py.ExceptionNewf(py.ValueError, "math domain error")
	ERANGE = py.ExceptionNewf(py.OverflowError, "math range error")
)

In general, on an IEEE-754 platform the aim is to follow the C99 standard, including Annex 'F', whenever possible. Where the standard recommends raising the 'divide-by-zero' or 'invalid' floating-point exceptions, Python should raise a ValueError. Where the standard recommends raising 'overflow', Python should raise an OverflowError. In all other circumstances a value should be returned.