#!/usr/bin/env python
# This script will generate a random 50-character string suitable for use as a SECRET_KEY.
import random

charset = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*(-_=+)'
secure_random = random.SystemRandom()
print(''.join(secure_random.sample(charset, 50)))

#!/usr/bin/env python
# This script will generate a random 50-character string suitable for use as a SECRET_KEY.
import secrets

charset = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*(-_=+)'
print(''.join(secrets.choice(charset) for _ in range(50)))

Fix how SECRET_KEY is generated
Fix how SECRET_KEY is generated

Use secrets.choice instead of random.sample to generate the secret key.