[Exercise 7.2] NameError: name 'environment' is not defined

[Xuanaxx]

Hello,

When I run the program comparison.py in Exercise 7.2, the program reports the following error
Traceback (most recent call last):

File "D:\Download\Anaconda\envs\py39torch\lib\concurrent\futures\process.py", line 246, in _process_worker
r = call_item.fn(*call_item.args, **call_item.kwargs)
File "D:\Download\Anaconda\envs\py39torch\lib\concurrent\futures\process.py", line 205, in _process_chunk
return [fn(*args) for args in chunk]
File "D:\Download\Anaconda\envs\py39torch\lib\concurrent\futures\process.py", line 205, in
return [fn(*args) for args in chunk]
File "d:\Desktop\python_work\RL\RLhomework4\comparison.py", line 44, in run_pred
return test_predictor(x, **y)
File "d:\Desktop\python_work\RL\RLhomework4\comparison.py", line 35, in test_predictor
e = predictor.environment.generate_episode()
File "d:\Desktop\python_work\RL\RLhomework4\comparison.py", line 94, in generate_episode
environment.next()
NameError: name 'environment' is not defined

After a period of debugging, I found that the environment.next() in the member function generate_episode of the class RandomWalkEnvironment should be changed to self.next(). With this modification, the bug disappears.

Thanks and keep up the good work !