Traceback (most recent call last):


 "examples/rllab/stabilizing_the_ring.py", line 9, in <module>

from flow.scenarios.loop.gen import CircleGenerator


 "/Users/cathywu/NotDropbox/flow-public/flow/scenarios/__init__.py", line 4, in <module>

from flow.scenarios.base_scenario import Scenario


 "/Users/cathywu/NotDropbox/flow-public/flow/scenarios/base_scenario.py", line 16, in <module>

from flow.core.traffic_lights import TrafficLights


 "/Users/cathywu/NotDropbox/flow-public/flow/core/traffic_lights.py", line 3, in <module>

import traci.constants as tc
ImportError: No module named 'traci'

Traceback (most recent call last):


 "examples/mxnet/sse/sse_batch.py", line 16, in <module>

from dgl.data import register_data_args, load_data


 "/usr/local/lib/python3.5/dist-packages/dgl-0.0.1-py3.5-linux-x86_64.egg/dgl/data/__init__.py", line 6, in <module>

from .tree import *


 "/usr/local/lib/python3.5/dist-packages/dgl-0.0.1-py3.5-linux-x86_64.egg/dgl/data/tree.py", line 9, in <module>

from nltk.tree import Tree
ImportError: No module named 'nltk'
