How can I randomize existing byte array?

Question

I create an array of bytes.

array = bytearray(random.randint(1, 8192))

# Now, how can I randomize array's elements?

Now how can I randomize each elements of the array?

Just like,

// with Java
var array = new byte[ThreadLocalRandom.current().nextInt(1, 8192)];
ThreadLocalRandom.current().nextBytes(array);

Answer 1

def randomize(array):
    array[:] = random.randbytes(len(array))

Behaves like your answer's but is ~100 times faster. Time with an average-length array (4096 bytes):

  23.0 ±  0.3 μs  randomize_Kelly
2191.5 ± 11.6 μs  randomize_Jin

Python: 3.11.4 (main, Sep  9 2023, 15:09:21) [GCC 13.2.1 20230801]

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