What's the best way to generate random strings of a specific length in Python?

Question

For a project, I need a method of creating thousands of random strings while keeping collisions low. I\'m looking for them to be only 12 characters long and uppercase only.

Answer 1

For cryptographically strong pseudo-random bytes you might use the pyOpenSSL wrapper around OpenSSL.

It provides the bytes function to gather a pseudo-random sequences of bytes.

from OpenSSL import rand

b = rand.bytes(7)

_{BTW, 12 uppercase letters is a little bit more that 56 bits of entropy. You will only to have to read 7 bytes.}