Hotgram free Socks5 proxies, 10 different servers, Python3

proxies.py

import urllib.request
import json
import base64
from Crypto.Cipher import AES as _AES
import random
class AES(object):
    def __init__(self, key="KCH@LQj#>6VCqqLg", iv="YC'2bmK=b%#NQ?9j"):
        self.bs = 16
        self.cipher = _AES.new(key, _AES.MODE_CBC, iv)

    def encrypt(self, raw):
        raw = self._pad(raw)
        encrypted = self.cipher.encrypt(raw)
        encoded = base64.b64encode(encrypted)
        return str(encoded, 'utf-8')

    def decrypt(self, raw):
        decoded = base64.b64decode(raw)
        decrypted = self.cipher.decrypt(decoded)
        return str(self._unpad(decrypted), 'utf-8')

    def _pad(self, s):
        return s + (self.bs - len(s) % self.bs) * chr(self.bs - len(s) % self.bs)

    def _unpad(self, s):
        return s[:-ord(s[len(s)-1:])]
def get_proxy(server=None) :
    servers = ["lh1.talagram.ir", "lh81.talagram.ir", "lh80.talagram.ir", "lh9.talagram.ir", "lh23.talagram.ir", "lh82.talagram.ir", "lh12.talagram.ir", "lh33.talagram.ir", "lh53.talagram.ir", "lh12.talagram.ir", "lh67.talagram.ir"]
    if not server:
         server = random.choice(servers)
    data = json.loads(urllib.request.urlopen("http://" + server + "/v1/proxy").read())["data"][0]
    raw = AES().decrypt(data)
    proxy = json.loads(raw)
    ip = proxy["ip"].split(".")
    proxy["ip"] = ".".join([ip[1], ip[0], ip[2], ip[3]])
    return "https://t.me/socks?server={ip}&port={prt}&user={usr}&pass={pwd}".format(**proxy)
print(get_proxy())

Not work !

Traceback (most recent call last):
  File "sh.py", line 37, in <module>
    print(get_proxy())
  File "sh.py", line 31, in get_proxy
    data = json.loads(urllib.request.urlopen("http://" + server + "/v1/proxy").read())["data"][0]
  File "/usr/lib/python3.5/json/__init__.py", line 312, in loads
    s.class.name))
TypeError: the JSON object must be str, not 'bytes'