types – Double precision floating values in Python?
types – Double precision floating values in Python?
Pythons built-in float type has double precision (its a C double in CPython, a Java double in Jython). If you need more precision, get NumPy and use its numpy.float128.
- Unlike hardware based binary floating point, the decimal module has a user alterable precision (defaulting to 28 places) which can be as large as needed for a given problem.
If you are pressed by performance issuses, have a look at GMPY
types – Double precision floating values in Python?
For some applications you can use Fraction instead of floating-point numbers.
>>> from fractions import Fraction
>>> Fraction(1, 3**54)
Fraction(1, 58149737003040059690390169)
(For other applications, theres decimal, as suggested out by the other responses.)