Traceback (most recent call last):


 "train.py", line 25, in <module>

from stable_baselines.common.cmd_util import make_atari_env


 "/root/venv/lib/python3.5/site-packages/stable_baselines/common/cmd_util.py", line 8, in <module>

from gym.wrappers import FlattenDictWrapper
ImportError: cannot import name 'FlattenDictWrapper'

Traceback (most recent call last):


 "<string>", line 1, in <module>


 "/usr/lib/python2.7/site-packages/urllib3/__init__.py", line 10, in <module>

from .connectionpool import (


 "/usr/lib/python2.7/site-packages/urllib3/connectionpool.py", line 29, in <module>

from .packages.ssl_match_hostname import CertificateError


 "/usr/lib/python2.7/site-packages/urllib3/packages/__init__.py", line 3, in <module>

from . import ssl_match_hostname
ImportError: cannot import name ssl_match_hostname
