python:如何将有效的uuid从String转换为UUID？

Question

我收到数据为

   {
        "name": "Unknown",
        "parent": "Uncategorized",
        "uuid": "06335e84-2872-4914-8c5d-3ed07d2a2f16"
    },

我需要转换uuid从String到uuid

我没有在python文档上找到方法,或者我在这里遗漏了一些基本的东西？

Answer 1

只需将其传递给uuid.UUID:

import uuid

o = {
    "name": "Unknown",
    "parent": "Uncategorized",
    "uuid": "06335e84-2872-4914-8c5d-3ed07d2a2f16"
}

print uuid.UUID(o['uuid']).hex

Answer 2

不要调用.hexUUID 对象，除非您需要该 uuid 的字符串表示。

>>> import uuid
>>> some_uuid = uuid.uuid4()
>>> type(some_uuid)
<class 'uuid.UUID'>
>>> some_uuid_str = some_uuid.hex
>>> some_uuid_str
'5b77bdbade7b4fcb838f8111b68e18ae'
>>> type(some_uuid_str)
<class 'str'>

然后正如上面提到的将 uuid 字符串转换回 UUID 实例的其他人所做的：

>>> uuid.UUID(some_uuid_str)
UUID('5b77bdba-de7b-4fcb-838f-8111b68e18ae')
>>> (some_uuid == uuid.UUID(some_uuid_str))
True
>>> (some_uuid == some_uuid_str)
False

如果需要，您甚至可以设置一个小的辅助实用程序函数来验证str并返回 UUID：

def is_valid_uuid(val):
    try:
        return uuid.UUID(str(val))
    except ValueError:
        return None

然后使用它：

>>> some_uuid = uuid.uuid4()
>>> is_valid_uuid(some_uuid)
UUID('aa6635e1-e394-463b-b43d-69eb4c3a8570')
>>> type(is_valid_uuid(some_uuid))
<class 'uuid.UUID'>

Answer 3

如果上述答案对您将字符串格式的有效 UUID 转换回实际 UUID 对象不起作用...使用uuid.UUID(your_uuid_string)对我有用。

In [6]: import uuid
   ...:
   ...: o = {
   ...:     "name": "Unknown",
   ...:     "parent": "Uncategorized",
   ...:     "uuid": "06335e84-2872-4914-8c5d-3ed07d2a2f16"
   ...: }
   ...:
   ...: print uuid.UUID(o['uuid']).hex
   ...: print type(uuid.UUID(o['uuid']).hex)
06335e84287249148c5d3ed07d2a2f16
<type 'str'>

In [7]: your_uuid_string = uuid.UUID(o['uuid']).hex

In [8]: print uuid.UUID(your_uuid_string)
06335e84-2872-4914-8c5d-3ed07d2a2f16

In [9]: print type(uuid.UUID(your_uuid_string))
<class 'uuid.UUID'>