First run through the Jupyter notebook step-by-step with the run command with the default values and ensure that the environment is working correctly.  Training with Tensorflow/CPU will require ~150 hours of computations. If you have a nVidia Geforce series 10 (1060/1070/1080) you can reduce this to only a few hours. (edit requirements.txt to install the GPU version of Tensorflow)
Note: The guide references the file "reinforcement-learning.py" in several places.  This should be "reinforcement_learning.py"