Generate a UUID in Python
Python is a very popular, interpreted, dynamically typed, object-oriented programming language.
First released in 1991 by Guido van Rossum, Python makes use of indentation and whitespace to delimit different blocks of code. It is a general-purpose language and as such is used in many different contexts including (to name just a few) web applications and artificial intelligence.
How to Generate a UUID in Python
The Python language has built-in support for generating Version 1, 3, 4 and 5 UUIDs. Here's an example of how you can create a Version 4 UUID in Python code.
import uuidmyuuid = uuid.uuid4()print('Your UUID is: ' + str(myuuid))
- On line #1, we import Python's built-in uuid module.
- On line #3, we generate a new Version 4 UUID using the
uuidmodule and store it in the variable,
myuuid. This is an instance of Python's UUID class, not a string.
- On line #5, we use Python's function,
str, to convert from the UUID object to a string.
- The output from line #5 will be something like:
Your UUID is: c303282d-f2e6-46ca-a04a-35d3d873712d
uuid module has a number of other
functions, such as for generating other UUID versions (i.e. 1, 3, 4, and 5). An instance of the Python UUID class has
a number of useful
methods on it, such as for converting the UUID
to bytes, or for
converting to a 32 character string (i.e.
normal UUID without the '-' characters).
Convert from a String to a UUID
Although it's rare, in some circumstances you might need to convert from a string (like the
one generated on line #5 above) or byte representation of a UUID back into an instance of
uuid module provides for this scenario with the constructor method,
You can call this method like this:
import uuidmyuuid = uuid.uuid4()myuuidStr = str(myuuid)sameMyUuid = uuid.UUID(myuuidStr)assert myuuid == sameMyUuid
- Line #3 generates a new Version 4 UUID.
- Line #4 converts the UUID instance into a string, using the
- Line #6 converts the string representation of a UUID into a Python
sameMyUuid) using the
uuid.UUID()method. Note that this method accepts a number of different formats, including strings and bytes.
- Line #7 is included to show that the 2
UUIDinstances are equal.
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