erdos module error during the first run

[fabiom95]

erdos module gives an error when i follow the manual installation instructions listed here to run pylot.py:

export CARLA_HOME=$PYLOT_HOME/dependencies/CARLA_0.9.10.1/
cd $PYLOT_HOME/scripts/
source ./set_pythonpath.sh
cd  $PYLOT_HOME/
python3 pylot.py --flagfile=configs/detection.conf

The output is:

I tensorflow/stream_executor/platform/default/dso_loader.cc:53] Successfully opened dynamic library libcudart.so.11.0
Traceback (most recent call last):
  File "pylot.py", line 261, in main
    node_handle, control_display_stream = driver()
  File "pylot.py", line 51, in driver
    pipeline_finish_notify_stream,
  File "/home/fabio/Desktop/pylot/pylot/pylot/operator_creator.py", line 15, in add_simulator_bridge
    from pylot.simulation.carla_operator import CarlaOperator
  File "/home/fabio/Desktop/pylot/pylot/pylot/simulation/carla_operator.py", line 20, in <module>
    class CarlaOperator(erdos.Operator):
AttributeError: module 'erdos' has no attribute 'Operator'`

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "pylot.py", line 274, in <module>
    app.run(main)
  File "/home/fabio/anaconda3/envs/pylotEnv_py37/lib/python3.7/site-packages/absl/app.py", line 312, in run
    _run_main(main, args)
  File "/home/fabio/anaconda3/envs/pylotEnv_py37/lib/python3.7/site-packages/absl/app.py", line 258, in _run_main
    sys.exit(main(argv))
  File "pylot.py", line 269, in main
    shutdown_pylot(node_handle, client, world)
UnboundLocalError: local variable 'node_handle' referenced before assignment

It seems I am having problems with the erdos module. I installed the version 0.4.0 and I checked it is listed in the virtual environment. (I tried also other versions as the 0.3.1).

[sukritkalra]

Hi @fabiom95!

ERDOS v0.4.0 has a new API that isn't compatible with the Pylot API (we are currently in the midst of porting Pylot to it and you can follow the development on the redesign branch).

However, Pylot should be compatible with v0.3.1, but it looks to me that your erdos installation didn't complete successfully. Did you build it from Github or do a pip install erdos==0.3.1?

In any case, could you please try running any of the examples from the ERDOS repository here (maybe the watermarks.py one) and let us know what errors you receive if any?

Also, you could pull the pylot docker image to ensure that all your dependencies are in sync, which is the current recommended way of experimenting with pylot.

[yang-yk]

Hello, I have met the same problem. Have you solved it? I have changed my erdos version to 0.3.1 and the problem still exists. The code stopped in the driver function in the pylot.py file (line 55 for adding sensors). Thanks very much! @fabiom95 @sukritkalra