finfo(dtype)

Machine limits for floating point types.

Attributes ---------- bits : int The number of bits occupied by the type. eps : float The smallest representable positive number such that ``1.0 + eps != 1.0``. Type of `eps` is an appropriate floating point type. epsneg : floating point number of the appropriate type The smallest representable positive number such that ``1.0 - epsneg != 1.0``. iexp : int The number of bits in the exponent portion of the floating point representation. machar : MachAr The object which calculated these parameters and holds more detailed information. machep : int The exponent that yields `eps`. max : floating point number of the appropriate type The largest representable number. maxexp : int The smallest positive power of the base (2) that causes overflow. min : floating point number of the appropriate type The smallest representable number, typically ``-max``. minexp : int The most negative power of the base (2) consistent with there being no leading 0's in the mantissa. negep : int The exponent that yields `epsneg`. nexp : int The number of bits in the exponent including its sign and bias. nmant : int The number of bits in the mantissa. precision : int The approximate number of decimal digits to which this kind of float is precise. resolution : floating point number of the appropriate type The approximate decimal resolution of this type, i.e., ``10**-precision``. tiny : float The smallest positive usable number. Type of `tiny` is an appropriate floating point type.

Parameters ---------- dtype : float, dtype, or instance Kind of floating point data-type about which to get information.

See Also -------- MachAr : The implementation of the tests that produce this information. iinfo : The equivalent for integer data types.

Notes ----- For developers of NumPy: do not instantiate this at the module level. The initial calculation of these parameters is expensive and negatively impacts import times. These objects are cached, so calling ``finfo()`` repeatedly inside your functions is not a problem.

Attribute bits: get value or raise Not_found if None.

Attribute bits: get value as an option.

Attribute eps: get value or raise Not_found if None.

Attribute eps: get value as an option.

Attribute epsneg: get value or raise Not_found if None.

Attribute epsneg: get value as an option.

Attribute iexp: get value or raise Not_found if None.

Attribute iexp: get value as an option.

Attribute machar: get value or raise Not_found if None.

Attribute machar: get value as an option.

Attribute machep: get value or raise Not_found if None.

Attribute machep: get value as an option.

Attribute max: get value or raise Not_found if None.

Attribute max: get value as an option.

Attribute maxexp: get value or raise Not_found if None.

Attribute maxexp: get value as an option.

Attribute min: get value or raise Not_found if None.

Attribute min: get value as an option.

Attribute minexp: get value or raise Not_found if None.

Attribute minexp: get value as an option.

Attribute negep: get value or raise Not_found if None.

Attribute negep: get value as an option.

Attribute nexp: get value or raise Not_found if None.

Attribute nexp: get value as an option.

Attribute nmant: get value or raise Not_found if None.

Attribute nmant: get value as an option.

Attribute precision: get value or raise Not_found if None.

Attribute precision: get value as an option.

Attribute resolution: get value or raise Not_found if None.

Attribute resolution: get value as an option.

Attribute tiny: get value or raise Not_found if None.

Attribute tiny: get value as an option.

Print the object to a human-readable representation.

Print the object to a human-readable representation.

Pretty-print the object to a formatter.