Traceback (most recent call last):


 "C:\ProgramData\Anaconda3\lib\site-packages\spyder\utils\external\github.py", line 51, in <module>

from urllib2 import build_opener, HTTPSHandler, Request, HTTPError
ModuleNotFoundError: No module named 'urllib2'

2020-05-27 14:15:40.892 [launcher][ERROR] Except stack:Traceback (most recent call last):


 "code/default/launcher/start.py", line 164, in <module>

import OpenSSL as oss_test


 "/usr/lib/python3/dist-packages/OpenSSL/__init__.py", line 8, in <module>

from OpenSSL import crypto, SSL


 "/usr/lib/python3/dist-packages/OpenSSL/crypto.py", line 12, in <module>

from cryptography import x509


 "/usr/lib/python3/dist-packages/cryptography/x509/__init__.py", line 8, in <module>

from cryptography.x509.base import (


 "/usr/lib/python3/dist-packages/cryptography/x509/base.py", line 18, in <module>

from cryptography.x509.extensions import Extension, ExtensionType


 "/usr/lib/python3/dist-packages/cryptography/x509/extensions.py", line 20, in <module>

from cryptography.hazmat.primitives import constant_time, serialization


 "/usr/lib/python3/dist-packages/cryptography/hazmat/primitives/constant_time.py", line 11, in <module>

from cryptography.hazmat.bindings._constant_time import lib
ModuleNotFoundError: No module named '_cffi_backend'
