java - Python 解析 Java Double.toHexString(double) 的输出

Question

是否可以在 Python 中解析从 Java Double.toHexString 方法编写的字符串？

http://docs.oracle.com/javase/7/docs/api/java/lang/Double.html#toHexString(double)

输出如下所示:“0x1.16d6b97e718ffp8”...不确定这是否是标准化格式。

我期望类似的东西

value=float('0x1.16d6b97e718ffp8')

Answer 1

那就是float.fromhex :

>>> float.fromhex('0x1.16d6b97e718ffp8')
278.8387679126026

来自文档:

This syntax is similar to the syntax specified in section 6.4.4.2 of the C99 standard, and also to the syntax used in Java 1.5 onwards. In particular, the output of float.hex() is usable as a hexadecimal floating-point literal in C or Java code, and hexadecimal strings produced by C’s %a format character or Java’s Double.toHexString are accepted by float.fromhex().