FileNotFoundError: [Errno 2] No such file or directory: 'config/demo.yml'

[FlyerMaxwell]

When I follow the instructions by the authors to run demo1, I met the following error:

Traceback (most recent call last):
  File "demo1_gen_data.py", line 69, in <module>
    config = yaml.load(open(config_filename))
FileNotFoundError: [Errno 2] No such file or directory: 'config/demo.yml'

I soled it by changing the verision of pyyaml

pip install pyyaml==5.4.1

After doing this, there is still a warning:

demo/demo1_gen_data.py:69: YAMLLoadWarning: calling yaml.load() without Loader=... is deprecated, as the default Loader is unsafe. Please read https://msg.pyyaml.org/load for full details.
  config = yaml.load(open(config_filename))

But it can produce the range image correctly.

Record this for someone who may meet the same problem. :)