Generate cryptographically safe passwords with Python in 4 lines of code

Introduction

The secrets module is used for generating cryptographically strong random numbers suitable for managing data such as passwords, account authentication, security tokens, and related secrets.

In particular, secrets should be used in preference to the default pseudo-random number generator in the random module, which is designed for modelling and simulation, not security or cryptography.

Using `secrets.token_hex`

This is the easiest method to generate a random text of string, in hexadecimal.

>>> token_hex(16)  
'f9bf78b9a18ce6d46a0cd2b0b86df9da'

In a single line, you get a good enough password. But, yeah there is a but, if you want real hardcore, unbreakable password this is how to do it.

Using `secrets.choice`

secrets.choice return a randomly-chosen element from a non-empty sequence. we just have to provide enough variation as the input string.

import string
from secrets import choice

characters = string.ascii_letters + string.punctuation + string.digits
print(characters)
# abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~0123456789

password = "".join(choice(characters) for x in range(0, 32))
print(password)
# ONFe[)P>5^(jnJ\7ZgYw,|671BZ&!8R"