[Bug Report] AttributeError: module 'nmmo.lib.material' has no attribute 'Forest'

[liuqi8827]

OS: Ubuntu 16.04

Description:

1. mkdir neural-mmo && cd neural-mmo
2. git clone https://github.com/neuralmmo/environment.git
3. git clone https://github.com/neuralmmo/baselines.git
4. cd environment && pip install -e .[all]
5. cd baselines && pip install -r requirements.txt
6. python train.py
   Then, the error occurred:

Traceback (most recent call last):
  File "/home/xxx/neural-mmo/baselines/train.py", line 14, in <module>
    from model.realikun.baseline_agent import BaselineAgent
  File "/home/xxx/neural-mmo/baselines/model/realikun/baseline_agent.py", line 10, in <module>
    from model.realikun.policy import BaselinePolicy
  File "/home/xxx/neural-mmo/baselines/model/realikun/policy.py", line 5, in <module>
    from env.nmmo_team_env import NMMOTeamEnv
  File "/home/xxx/neural-mmo/baselines/env/nmmo_team_env.py", line 8, in <module>
    from feature_extractor.feature_extractor import FeatureExtractor
  File "/home/xxx/neural-mmo/baselines/feature_extractor/feature_extractor.py", line 6, in <module>
    from feature_extractor.map_helper import MapHelper
  File "/home/xxx/neural-mmo/baselines/feature_extractor/map_helper.py", line 9, in <module>
    from nmmo.io import action
ModuleNotFoundError: No module named 'nmmo.io'

7. I solved the error ModuleNotFoundError: No module named 'nmmo.io' by changing from nmmo.io import action to from nmmo.core import action in /home/xxx/neural-mmo/baselines/feature_extractor/map_helper.py", line 9.
8. However, another error occurred when I run python train.py:

Traceback (most recent call last):
  File "/home/xxx/neural-mmo/baselines/train.py", line 14, in <module>
    from model.realikun.baseline_agent import BaselineAgent
  File "/home/xxx/neural-mmo/baselines/model/realikun/baseline_agent.py", line 10, in <module>
    from model.realikun.policy import BaselinePolicy
  File "/home/xxx/neural-mmo/baselines/model/realikun/policy.py", line 5, in <module>
    from env.nmmo_team_env import NMMOTeamEnv
  File "/home/xxx/neural-mmo/baselines/env/nmmo_team_env.py", line 8, in <module>
    from feature_extractor.feature_extractor import FeatureExtractor
  File "/home/xxx/neural-mmo/baselines/feature_extractor/feature_extractor.py", line 6, in <module>
    from feature_extractor.map_helper import MapHelper
  File "/home/xxx/neural-mmo/baselines/feature_extractor/map_helper.py", line 34, in <module>
    material.Forest.index: material.Scrub.index,
AttributeError: module 'nmmo.lib.material' has no attribute 'Forest'

9. Thus, there are some bugs, can the baselines repository run successfully?

[tangyunlong]

Hi, the problem I have encountered is the same as yours, and I am trying to solve it. Do you have any solutions now? Thank you.
@jsuarez5341