python - 提高 float 的准确性

Question

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Answer 1

我最近不得不处理这个问题和 mpmath很完美。它是纯 Python，遵循 BSD 许可。

Mpmath is a pure-Python library for multiprecision floating-point arithmetic. It provides an extensive set of transcendental functions, unlimited exponent sizes, complex numbers, interval arithmetic, numerical integration and differentiation, root-finding, linear algebra, and much more. Almost any calculation can be performed just as well at 10-digit or 1000-digit precision, and in many cases mpmath implements asymptotically fast algorithms that scale well for extremely high precision work

它并没有慢很多，而且它可以利用 gmpy如果安装了库(支持快速多精度算术的 C 编码 Python 扩展模块)。