AttributeError: Fourrooms instance has no attribute 'unwrapped'

[cardwing]

In order to run the four-room navigation task, you need to install gym-0.7.2. Or you will get the following error:
[2017-04-27 10:10:04,648] Making new env: Fourrooms-v0
Traceback (most recent call last):
File "transfer.py", line 201, in
env = gym.make('Fourrooms-v0')
File "/home/cardwing/gym/gym/envs/registration.py", line 161, in make
return registry.make(id)
File "/home/cardwing/gym/gym/envs/registration.py", line 119, in make
env = spec.make()
File "/home/cardwing/gym/gym/envs/registration.py", line 89, in make
env.unwrapped.spec = self
AttributeError: Fourrooms instance has no attribute 'unwrapped'

Hope this will help you if you meet the same problem.
Regards,
Cardwing

[HuangLianZhen]

How did you solve it later? I have the same problem with you