| can_cast ([from, to]) | Returns True if cast between data types can occur without losing precision. | 
| common_type (*arrays) | Return the inexact scalar type which is most common in a list of arrays. | 
| obj2sctype (rep[, default]) | 
| dtype (obj[, align, copy]) | Create a data type object. | 
| format_parser | Class to convert formats, names, titles description to a dtype | 
| finfo (dtype) | Machine limits for floating point types. | 
| iinfo (type) | Machine limits for integer types. | 
| MachAr | Diagnosing machine parameters. | 
| issctype (rep) | Determines whether the given object represents a numeric array type. | 
| issubdtype (arg1, arg2) | Returns True if first argument is a typecode lower/equal in type hierarchy. | 
| issubsctype (arg1, arg2) | |
| issubclass_ (arg1, arg2) | |
| find_common_type (array_types, scalar_types) | Determine common type following standard coercion rules | 
| typename (char) | Return a description for the given data type code. | 
| sctype2char (sctype) | |
| mintypecode (typechars[, typeset, default]) | Return a minimum data type character from typeset that handles all typechars given |