math — Mathematical functions — Python 3.13.3 documentation
1 day ago · math. ulp (x) ¶ Return the value of the least significant bit of the float x:. If x is a NaN (not a number), return x.. If x is negative, return ulp(-x).. If x is a positive infinity, return x.. If x is equal to zero, return the smallest positive denormalized representable float (smaller than the minimum positive normalized float, sys.float_info.min).. If x is equal to the largest positive ...
15. 浮点算术：争议和限制 — Python 3.7.13 文档
Mar 7, 2013 · 以此类推。结果是无论你写下多少的数字，它都永远不会等于 1/3 ，只是更加更加地接近 1/3 。 同样的道理，无论你使用多少位以 2 为基数的数码，十进制的 0.1 都无法精确地表示为一个以 2 为基数的小数。
9.2. math — 数学函数 — Python 2.7.18 文档
9.2. math — 数学函数¶. This module is always available. It provides access to the mathematical functions defined by the C standard. 这些函数不适用于复数；如果你需要计算复数，请使用 cmath 模块中的同名函数。 将支持计算复数的函数区分开的目的，来自于大多数开发者并不愿意像数学家一样需要学习复数的概念。
組み込み関数 — Python 3.13.3 ドキュメント
awaitable anext (async_iterator) ¶ awaitable anext (async_iterator, default). 待ち受け中に、与えられた非同期イテレータ (asynchronous iterator) を返します。イテレータが枯渇した場合、 default が与えられていれば default を返します。 これは組み込みの next() 関数の非同期版であり、同じように動作します。
statistics — Mathematical statistics functions — Python 3.14.0a7 …
statistics. harmonic_mean (data, weights = None) ¶ Return the harmonic mean of data, a sequence or iterable of real-valued numbers.If weights is omitted or None, then equal weighting is assumed.. The harmonic mean is the reciprocal of the arithmetic mean() of the reciprocals of the data. For example, the harmonic mean of three values a, b and c will be equivalent to 3/(1/a + …
What’s New in Python 2.6 — Python 3.13.2 documentation
PEP 343: The ‘with’ statement¶. The previous version, Python 2.5, added the ‘ with ’ statement as an optional feature, to be enabled by a from __future__ import with_statement directive. In 2.6 the statement no longer needs to be specially enabled; this means that with is now always a keyword. The rest of this section is a copy of the corresponding section from the “What’s New in ...