python - 哪些平台提供 SystemRandom？

Question

Python 的 random.SystemRandom 提供加密质量的伪随机数。它支持哪些平台？最重要的是，有没有不支持它的平台，如果有，是哪些平台？任何人都可以提供有关它的便携性的任何信息吗？

Answer 1

来自 http://docs.python.org/library/random.html

The random module also provides the SystemRandom class which uses the system function os.urandom() to generate random numbers from sources provided by the operating system.

来自 http://docs.python.org/library/os.html#os.urandom

This function returns random bytes from an OS-specific randomness source. The returned data should be unpredictable enough for cryptographic applications, though its exact quality depends on the OS implementation. On a UNIX-like system this will query /dev/urandom, and on Windows it will use CryptGenRandom. If a randomness source is not found, NotImplementedError will be raised.