iinfo.max Maximum value of given dtype.

iinfo.min Minimum value of given dtype.

numpy.issubsctype(arg1, arg2)

class numpy.finfo

class numpy.dtype

numpy.common_type(*arrays)

numpy.obj2sctype(rep, default=None)

numpy.min_scalar_type(a) For scalar a, returns the data type with the smallest size and smallest scalar

numpy.result_type(*arrays_and_dtypes) Returns the type that results from applying the NumPy type promotion rules to the arguments

dtype.str The array-protocol typestring of this data-type object.