28 lines
696 B
Python
28 lines
696 B
Python
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import uos
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import ubinascii
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class UUID:
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def __init__(self, bytes):
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if len(bytes) != 16:
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raise ValueError('bytes arg must be 16 bytes long')
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self._bytes = bytes
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@property
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def hex(self):
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return ubinascii.hexlify(self._bytes).decode()
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def __str__(self):
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h = self.hex
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return '-'.join((h[0:8], h[8:12], h[12:16], h[16:20], h[20:32]))
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def __repr__(self):
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return "<UUID: %s>" % str(self)
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def uuid4():
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"""Generates a random UUID compliant to RFC 4122 pg.14"""
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random = bytearray(uos.urandom(16))
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random[6] = (random[6] & 0x0F) | 0x40
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random[8] = (random[8] & 0x3F) | 0x80
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return UUID(bytes=random)
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