Traceback (most recent call last):


 "/home/belidzs/venv/bin/airflow", line 25, in <module>

from airflow.configuration import conf


 "/home/belidzs/venv/lib/python3.5/site-packages/airflow/__init__.py", line 42, in <module>

from airflow.models import DAG


 "/home/belidzs/venv/lib/python3.5/site-packages/airflow/models/__init__.py", line 21, in <module>

from airflow.models.baseoperator import BaseOperator, BaseOperatorLink
# noqa: F401


 "/home/belidzs/venv/lib/python3.5/site-packages/airflow/models/baseoperator.py", line 30, in <module>

from typing import Any, Callable, ClassVar, Dict, FrozenSet, Iterable, List, Optional, Set, Type, Union
ImportError: cannot import name 'ClassVar'

Traceback (most recent call last):


 "vtest.py", line 6, in <module>

from Crypto.PublicKey import RSA


 "C:\Python27\lib\Crypto\PublicKey\RSA.py", line 79, in <module>

from Crypto.IO import PKCS8, PEM


 "C:\Python27\lib\Crypto\IO\PKCS8.py", line 57, in <module>

from Crypto.IO._PBES import PBES1, PBES2


 "C:\Python27\lib\Crypto\IO\_PBES.py", line 27, in <module>

from Crypto import Random


 "C:\Python27\lib\Crypto\Random\__init__.py", line 28, in <module>

from Crypto.Random import OSRNG


 "C:\Python27\lib\Crypto\Random\OSRNG\__init__.py", line 34, in <module>

from Crypto.Random.OSRNG.nt import new


 "C:\Python27\lib\Crypto\Random\OSRNG\nt.py", line 28, in <module>

from Crypto.Random.OSRNG import winrandom
ImportError: cannot import name winrandom