How to Remove Dashes in UUID

UUIDs are just 128 bit pieces of data, that is displayed as (128/4) = 32 hexadecimal digits, like this :

• UUID v1 : c1b33c74-0006-11eb-9894-c83dd482e3ef
• UUID v4 : 8791f25b-d4ca-4f10-8f60-407a507edefe

Python has built-in uuid library to generate UUID easily:

$ python3
Python 3.8.1 (default, Feb 12 2020, 16:30:11)
[GCC 7.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import uuid
>>> print(uuid.uuid4())
8791f25b-d4ca-4f10-8f60-407a507edefe

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OK, how can we turn 8791f25b-d4ca-4f10-8f60-407a507edefe to 8791f25bd4ca4f108f60407a507edefe ?

There are regex solutions for this problem but I like to use python to solve this.

# utils.py from uuid import UUID

def uuid_to_hex(uuid):
    """Turn uuid4 with dashes to hex From : 8791f25b-d4ca-4f10-8f60-407a507edefe To : 8791f25bd4ca4f108f60407a507edefe :param uuid: uuid string with dashes :type uuid: str :returns: str - hex of uuid """

    return UUID(uuid).hex

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Example usage of this function:

$ python3
Python 3.8.1 (default, Feb 12 2020, 16:30:11)
[GCC 7.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from utils import uuid_to_hex
>>> _uuid = "8791f25b-d4ca-4f10-8f60-407a507edefe"
>>> print(uuid_to_hex(_uuid))
8791f25bd4ca4f108f60407a507edefe

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And yes, I like docs very much:

>>> uuid_to_hex.__doc__
'Turn uuid4 with dashes to hex\n\n From : 8791f25b-d4ca-4f10-8f60-407a507edefe\n To : 8791f25bd4ca4f108f60407a507edefe\n\n :param uuid: uuid string with dashes\n :type uuid: str\n\n :returns: str - hex of uuid\n '

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We can write this funtion also with Type Hints which introduced in PEP 484 in order to make it more readable(?). Type Hints requires Pythhon >= 3.5.

# utils.py from uuid import UUID

def uuid_to_hex(uuid: str) -> str:
    """Turn uuid4 with dashes to hex From : 8791f25b-d4ca-4f10-8f60-407a507edefe To : 8791f25bd4ca4f108f60407a507edefe :param uuid: uuid string with dashes :type uuid: str :returns: str - hex of uuid """

    return UUID(uuid).hex

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All done!

原文链接：How to Remove Dashes in UUID