numpy.finfo¶

classnumpy.finfo(dtype)[source]¶

Machine limits for floating point types.

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 negativelyimpacts import times. These objects are cached, so callingfinfo()repeatedly inside your functions is not a problem.

Attributes:

bits:int The number of bits occupied by the type. eps:float The smallest representable positive number such that1.0+eps!=1.0. Type ofeps is an appropriate floatingpoint type. epsneg:floating point number of the appropriate type The smallest representable positive number such that1.0-epsneg!=1.0. iexp:int The number of bits in the exponent portion of the floating pointrepresentation. machar:MachAr The object which calculated these parameters and holds moredetailed information. machep:int The exponent that yieldseps. 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 therebeing no leading 0’s in the mantissa. negep:int The exponent that yieldsepsneg. 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 offloat 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 oftiny is anappropriate floating point type.