from hashlib import sha512, sha256
from base64 import b64encode
from os import urandom

# Functions for create random strings usando urandom

def create_key_encrypt(n=10):
    """ Simple function for create a random string
    
    Simple function for create a random string based in sha512
    
    Args:
        n (int): size of string random bytes (view urandom function in Python3 Help)
    """
    
    return sha512(urandom(n)).hexdigest()

def create_key_encrypt_256(n=10):
    
    """ Simple function for create a random string
    
    Simple function for create a random string based in sha256
    
    Args:
        n (int): size of string random bytes (view urandom function in Python3 Help)
    """
    
    return sha256(urandom(n)).hexdigest()

def create_key(n=10):
    
    """ Simple function for create a random string
    
    Simple function for create a random string based in urandom function and base64 encoding
    
    Args:
        n (int): size of string random bytes (view urandom function in Python3 Help)
    """
    
    rand_bytes=urandom(n)
    
    return b64encode(rand_bytes).decode('utf-8')[0:-2]