New submission from Martijn Pieters <[email protected]>:
When someone accidentally passes in an existing uuid.UUID() instance into
uuid.UUID(), an attribute error is thrown because it is not a hex string:
>>> import uuid
>>> value = uuid.uuid4()
>>> uuid.UUID(value)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File
"/Users/mjpieters/Development/Library/buildout.python/parts/opt/lib/python2.7/uuid.py",
line 133, in __init__
hex = hex.replace('urn:', '').replace('uuid:', '')
AttributeError: 'UUID' object has no attribute 'replace'
This happened in the Stack Overflow question at
https://stackoverflow.com/q/47429929/100297, because the code there didn't take
into account that some database drivers may already have mapped the PostgreSQL
UUID column to a Python uuid.UUID() object.
The fix could be as simple as:
if hex is not None:
if isinstance(hex, uuid.UUID):
int = hex.int
else:
hex = hex.replace('urn:', '').replace('uuid:', '')
hex = hex.strip('{}').replace('-', '')
if len(hex) != 32:
raise ValueError('badly formed hexadecimal UUID string')
int = int_(hex, 16)
Or we could add a uuid=None keyword argument, and use
if hex is not None:
if isinstance(hex, uuid.UUID):
uuid = hex
else:
hex = hex.replace('urn:', '').replace('uuid:', '')
hex = hex.strip('{}').replace('-', '')
if len(hex) != 32:
raise ValueError('badly formed hexadecimal UUID string')
int = int_(hex, 16)
if uuid is not None:
int = uuid.int
----------
messages: 306719
nosy: mjpieters
priority: normal
severity: normal
status: open
title: Should uuid.UUID() accept another UUID() instance?
_______________________________________
Python tracker <[email protected]>
<https://bugs.python.org/issue32112>
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