How to create a GUID/UUID in Python

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How do I create a GUID in Python that is platform independent? I hear there is a method using ActivePython on Windows but it's Windows only because it uses COM. Is there a method using plain Python?

20.15. uuid — UUID objects according to RFC 4122, Note that uuid1() may compromise privacy since it creates a UUID containing the Generate a UUID from a host ID, sequence number, and the current time. UUID, Universal Unique Identifier, is a python library which helps in generating random objects of 128 bits as ids. It provides the uniqueness as it generates ids on the basis of time, Computer hardware (MAC etc.). Advantages of UUID : Can be used as general utility to generate unique random id. Can be used in cryptography and hashing applications.

If you're using Python 2.5 or later, the uuid module is already included with the Python standard distribution.

Ex:

>>> import uuid
>>> uuid.uuid4()
UUID('5361a11b-615c-42bf-9bdb-e2c3790ada14')

uuid — UUID objects according to RFC 4122, Note that uuid1() may compromise privacy since it creates a UUID containing Generate a UUID based on the MD5 hash of a namespace identifier (which is a  Create a UUID from either a string of 32 hexadecimal digits, a string of 16 bytes in big-endian order as the bytes argument, a string of 16 bytes in little-endian order as the bytes_le argument, a tuple of six integers (32-bit time_low, 16-bit time_mid, 16-bit time_hi_version, 8-bit clock_seq_hi_variant, 8-bit clock_seq_low, 48-bit node) as the fields argument, or a single 128-bit integer as the int argument. When a string of hex digits is given, curly braces, hyphens, and a URN prefix are

Copied from : https://docs.python.org/2/library/uuid.html (Since the links posted were not active and they keep updating)

>>> import uuid

>>> # make a UUID based on the host ID and current time
>>> uuid.uuid1()
UUID('a8098c1a-f86e-11da-bd1a-00112444be1e')

>>> # make a UUID using an MD5 hash of a namespace UUID and a name
>>> uuid.uuid3(uuid.NAMESPACE_DNS, 'python.org')
UUID('6fa459ea-ee8a-3ca4-894e-db77e160355e')

>>> # make a random UUID
>>> uuid.uuid4()
UUID('16fd2706-8baf-433b-82eb-8c7fada847da')

>>> # make a UUID using a SHA-1 hash of a namespace UUID and a name
>>> uuid.uuid5(uuid.NAMESPACE_DNS, 'python.org')
UUID('886313e1-3b8a-5372-9b90-0c9aee199e5d')

>>> # make a UUID from a string of hex digits (braces and hyphens ignored)
>>> x = uuid.UUID('{00010203-0405-0607-0809-0a0b0c0d0e0f}')

>>> # convert a UUID to a string of hex digits in standard form
>>> str(x)
'00010203-0405-0607-0809-0a0b0c0d0e0f'

>>> # get the raw 16 bytes of the UUID
>>> x.bytes
'\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f'

>>> # make a UUID from a 16-byte string
>>> uuid.UUID(bytes=x.bytes)
UUID('00010203-0405-0607-0809-0a0b0c0d0e0f')

Python UUID Module to Generate Universally Unique Identifiers , from the host ID, sequence number, and the current time. It uses the MAC address of a host as a source of uniqueness. The node and clock_seq are optional arguments. UUID4 uses pseudo-random number generators to generate UUID. Now, Let see the simple example to get the universally unique Id. import uuid # make a UUID based on the host address and current time uuidOne = uuid.uuid1() print ("Printing my First UUID of version 1") print(uuidOne) Run Online.

I use GUIDs as random keys for database type operations.

The hexadecimal form, with the dashes and extra characters seem unnecessarily long to me. But I also like that strings representing hexadecimal numbers are very safe in that they do not contain characters that can cause problems in some situations such as '+','=', etc..

Instead of hexadecimal, I use a url-safe base64 string. The following does not conform to any UUID/GUID spec though (other than having the required amount of randomness).

import base64
import uuid

# get a UUID - URL safe, Base64
def get_a_uuid():
    r_uuid = base64.urlsafe_b64encode(uuid.uuid4().bytes)
    return r_uuid.replace('=', '')

uuid — UUID objects according to RFC 4122, ) is also used, typically in software created by Microsoft. How to create a GUID/UUID in Python ; How to create a GUID/UUID in Python. 0 votes . 1 view. asked Jul 2, To create GUID/UUID you can use the following piece of

If you need to pass UUID for a primary key for your model or unique field then below code returns the UUID object -

 import uuid
 uuid.uuid4()

If you need to pass UUID as a parameter for URL you can do like below code -

import uuid
str(uuid.uuid4())

If you want the hex value for a UUID you can do the below one -

import uuid    
uuid.uuid4().hex

Universally unique identifier, Generating Random id's using UUID in Python. Advantages of UUID : Method 1 : Using uuid1() Representations of uuid1() Components of uuid1() Fields of uuid1() Drawback : This way includes the used of MAC address of computer, and hence can compromise the privacy, even though it provides uniquenes. Method 2 : Using uuid4 How to create a GUID/UUID in Python 0 votes How do I create a GUID in Python that is platform independent?There is a method using ActivePython on Windows but it's Windows only because it uses COM.

Generating Random id's using UUID in Python, To create GUID/UUID you can use the following piece of code:- import uuid. uuid.​uuid4(). str(uuid.uuid4()). uuid.uuid4().hex. image  Well, guess what? As we learned in the smooth refreshers series, Python strives to make things easy, and creating a UUID is no different. Here you go! import uuid print uuid.uuid4() Yes, that's it! This is all you need to generate a UUID in Python. On my machine, I got the following output: b77eafed-69ab-422d-8448-1ec1f0a2eb8c

How to create a GUID/UUID in Python, Python UUID module to generate the universally unique identifiers. Generate a version 1, 3, 4, and 5 UUIDs. secure random UUID. String to  df['uuid'] = df['col'].apply(lambda _: uuid.uuid4()) The downside to these is technically you're passing in a variable (_) that you don't actually use. It would be mildly nice to have the capability to do something like lambda: uuid.uuid4(), but apply doesn't support lambas with no args, which is reasonable given its use case would be rather limited.

How to create a GUID/UUID in Python, How do I create a GUID in Python that is platform independent?There is a method using ActivePython on Windows but it's Windows only  Generate a UUID from a host ID, sequence number, and the current time. If node is not given, getnode () is used to obtain the hardware address. If clock_seq is given, it is used as the sequence number; otherwise a random 14-bit sequence number is chosen. uuid.uuid3(namespace, name) ¶

Comments
  • docs.activestate.com/activepython/2.6/python/library/uuid.html
  • For the love of all that is sacred, it's a UUID - Universal Unique ID en.wikipedia.org/wiki/Universally_unique_identifier - its just that unfortunately MS has preferrred GUID.
  • Here's one liner for you: python -c 'import uuid; print(uuid.uuid4())'
  • Also, have a look at the shortuuid module I wrote, as it allows you to generate shorter, readable UUIDs: github.com/stochastic-technologies/shortuuid
  • @StavrosKorokithakis: have you written shortuuid module for Python 3.x by any chance?
  • @JayPatel Does shortuuid not work for Python 3? If not, please file a bug.
  • What's the difference between uuid4().hex and str(uuid4())?
  • Well, as you can see above, str(uuid4()) returns a string representation of the UUID with the dashes included, while uuid4().hex returns "The UUID as a 32-character hexadecimal string"
  • If you're not going to bother using it in any UUID contexts, you may as well just use random.getrandbits(128).to_bytes(16, 'little') or (for crypto randomness) os.urandom(16) and get a full 128 bits of random (UUIDv4 uses 6-7 bits on version info). Or use only 15 bytes (losing 1-2 bits of random vs. UUIDv4) and avoid the need to trim off = signs while also reducing the encoded size to 20 bytes (from 24, trimmed to 22), as any multiple of 3 bytes encodes to #bytes / 3 * 4 base64 characters with no padding required.
  • @ShadowRanger Yeah thats basically the idea. 128 random bits, as short as conveniently possible, while also being URL safe. Ideally it would only use upper and lower case letters and then numbers. So I guess a base-62 string.
  • When i use your function i get a type error from the return statement expecting a bytes-like object. It can be fixed with return str(r_uuid).replace('=','').
  • UUIDs are standard, and not variable in length. Generating a random string in a configurable way can be useful in some situations, but not in this context. You may check en.wikipedia.org/wiki/Universally_unique_identifier for definition.
  • Better avoid this one or you might run into compatibility issues (these are not standard GUIDs)
  • This seems completely unrelated to the question, which is about UUIDs.