增加浮點數精度

Question

如何將默認浮點數精度切換到另一個，也許是自定義？我需要這個，因爲我做了一些計算，我發現我應該增加默認的浮點精度。

Answer 1

我最近不得不處理這個問題和mpmath是完美的。這是純粹的Python，在BSD許可下。

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

現在還不算慢得多，它可以安裝，如果充分利用gmpy庫（一個C-coded Python extension modules that support fast multiple-precision arithmetic）。

Answer 2

如果你想要更高的精度我反而建議你使用bigfloat包（因爲這是它是製造）。或者，您也可以查看Decimal課程。