33 lines
1012 B
Python
33 lines
1012 B
Python
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import random
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import time
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class ULID:
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def __init__(self):
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# 定义字符集，使用Crockford's Base32字符集
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self.encoding = "0123456789ABCDEFGHJKMNPQRSTVWXYZ"
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def generate(self) -> str:
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# 获取当前时间戳（毫秒）
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timestamp = int(time.time() * 1000)
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# 生成随机数部分
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randomness = random.getrandbits(80) # 80位随机数
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# 转换时间戳为base32字符串（10个字符）
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time_chars = []
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for _ in range(10):
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timestamp, mod = divmod(timestamp, 32)
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time_chars.append(self.encoding[mod])
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time_chars.reverse()
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# 转换随机数为base32字符串（16个字符）
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random_chars = []
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for _ in range(16):
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randomness, mod = divmod(randomness, 32)
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random_chars.append(self.encoding[mod])
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random_chars.reverse()
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# 组合最终结果
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return ''.join(time_chars + random_chars)
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