parameters.py 文件源码

def __init__(self, seed):
        if not seed:
            seed = "%.1f" % time.time()

        if hasattr(seed, "encode"):
            seed = seed.encode('ascii')

        # A note on hashfunctions.
        # We don't need cryptographic quality, so we won't use hashlib -
        # that'd be way to slow. The zlib module contains two hash
        # functions. Adler32 is fast, but not very uniform for short
        # strings. Crc32 is slower, but has better bit distribution.
        # So, we use crc32 whenever the hash is converted into an
        # exportable number, but we use adler32 when we're producing
        # intermediate values.
        self.seed = zlib.adler32(seed)
        self.text_seed = seed

        # Default, typically overridden
        self.size = 1024 + 786j