Bug with push button

[maximericaud]

Describe the bug

process[car/state_publisher-16]: started with pid [14068]
Traceback (most recent call last):
  File "/home/robot/catkin_ws/src/mushr/mushr_hardware/push_button_utils/src/push_button.py", line 3, in <module>
    import Jetson.GPIO as GPIO
  File "/usr/local/lib/python2.7/dist-packages/Jetson/GPIO/__init__.py", line 1, in <module>
    from .gpio import *
  File "/usr/local/lib/python2.7/dist-packages/Jetson/GPIO/gpio.py", line 23, in <module>
    from Jetson.GPIO import gpio_pin_data
  File "/usr/local/lib/python2.7/dist-packages/Jetson/GPIO/gpio_pin_data.py", line 560
    msg = f"Environment variable 'JETSON_MODEL_NAME={model_name}' is invalid."
                                                                             ^
SyntaxError: invalid syntax
[car/push_button-14] process has died [pid 14050, exit code 1, cmd /home/robot/catkin_ws/src/mushr/mushr_hardware/push_button_utils/src/push_button.py __name:=push_button __log:=/home/robot/.ros/log/ed4a237a-c4a3-11ed-b0ca-0e569ec1aa55/car-push_button-14.log].
log file: /home/robot/.ros/log/ed4a237a-c4a3-11ed-b0ca-0e569ec1aa55/car-push_button-14*.log

To Reproduce
Steps to reproduce the behavior:

1. Open terminal
2. roslaunch mushr_base teleop.launch
3. See log attached

Environment

• OS: Ubuntu 18.04 LTS
• Platform: Jetson Nano
• Library versions: ROS melodic, python 2.7.17

ed4a237a-c4a3-11ed-b0ca-0e569ec1aa55.zip

[sidtalia]

Hi Maxime,

Apologies for the late response. MuSHR has moved to ROS-noetic since 2022, could you try using noetic instead?

Best,
Sidharth Talia.

[DKrishna007]

I'm guessing the issue is that the Jetson.GPIO library you're using is written for Python 3, but you're running it in a Python 2 ROS environment.

you can downgrade jetson.GPIO or move to Noetic since melodic is stuck to python2 or a quick hack: Patch the Library Manually

Open in bash:
sudo nano /usr/local/lib/python2.7/dist-packages/Jetson/GPIO/gpio_pin_data.py

Change the f-string to a regular string format, Replace:
msg = f"Environment variable 'JETSON_MODEL_NAME={model_name}' is invalid."
With:
msg = "Environment variable 'JETSON_MODEL_NAME={}' is invalid.".format(model_name)