有什么方法可以在 python 中生成唯一编号？

Question

Is there a way to generate unique numbers in python? Sort of like a database primary key?

And the random module of python can sometimes generate the same number. I want it to be completely unique.

Answer 1

import uuid
uuid.uuid4()
# UUID('e052c11d-e8ae-4a3d-a3e8-10d428a2e935')

UUID is a solution to generate generic random and unique values used as id. If you want in integer random and unique, you need a database or another data management system.

Answer 2

You can use time and then hash the output

import time
now = time.time()
print(now)
print(hash(now))

the output is:

1586515688.2441766
563032968135724776

with this way you have unique number forever.

Answer 3

import numpy as np

# create a (5, 5) array containing unique integers drawn from [0, 100]
uarray = np.random.choice(np.arange(0, 101), replace=False, size=(5, 5))

# check that each item occurs only once
print((np.bincount(uarray.ravel()) == 1).all())
# True