Preguntas frecuentes en Python

# https://cryptography.io/en/latest/fernet/
from cryptography.fernet import Fernet
key = Fernet.generate_key()
# key = b'wMMR6A25Mos2L3lp0EFfl5eMR24ozQuTaVNPTgFPjbk='
print(type(key),key)
f = Fernet(key)
token = f.encrypt(b"hola mundo")
print(token)

f.decrypt(token)

import json
from base64 import b64encode
from Crypto.Cipher import AES
from Crypto.Random import get_random_bytes

data = b"hola"
key = get_random_bytes(16)
print(type(key),key)
#key = b'12345678901234561234567890123456'
print(type(key),key)
cipher = AES.new(key, AES.MODE_CTR)
ct_bytes = cipher.encrypt(data)
nonce = b64encode(cipher.nonce).decode('utf-8')
ct = b64encode(ct_bytes).decode('utf-8')
result = json.dumps({'nonce':nonce, 'ciphertext':ct})
print(result)

import json
from base64 import b64decode
from Crypto.Cipher import AES
# We assume that the key was securely shared beforehand
try:
    b64 = json.loads(result)
    nonce = b64decode(b64['nonce'])
    ct = b64decode(b64['ciphertext'])
    cipher = AES.new(key, AES.MODE_CTR, nonce=nonce)
#     cipher = AES.new(key, AES.MODE_CTR)
    pt = cipher.decrypt(ct)
    print("The message was: ", pt)
except :
    print("Incorrect decryption")

l1 = [1,2,3,4]
l2 = [10,11,2]
r=map(lambda x: x+1,l1)
for x in r:
    print(x)

with open("in1.txt","rb") as archivo:
    t = b''
    for x in archivo.readlines():
        print(x)
        t += x
    print(type(t),t)