iinfo.min Minimum value of given dtype.

iinfo.max Maximum value of given dtype.

class numpy.dtype

numpy.common_type(*arrays)

numpy.issubsctype(arg1, arg2)

numpy.can_cast(from, totype, casting = 'safe') Returns True if cast between data types can occur according to the casting rule

dtype.fields Dictionary of named fields defined for this data type, or None. The dictionary is indexed

dtype.names Ordered list of field names, or None if there are no fields. The names are ordered according

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