project_4 : unsupported pickle protocol: %d" % proto

[nxnam714]

Hello,

I'm stuck in this issue when I run project 4:

$ python ./main.py
Loading cached camera calibration... Traceback (most recent call last):
File "./main.py", line 135, in
ret, mtx, dist, rvecs, tvecs = calibrate_camera(calib_images_dir='camera_cal')
File "/home/nxnam/DigitalRace/hanson/self-driving-car/project_4_advanced_lane_finding/calibration_utils.py", line 20, in wrapper
calibration = pickle.load(dump_file)
File "/usr/lib/python2.7/pickle.py", line 1384, in load
return Unpickler(file).load()
File "/usr/lib/python2.7/pickle.py", line 864, in load
dispatchkey
File "/usr/lib/python2.7/pickle.py", line 892, in load_proto
raise ValueError, "unsupported pickle protocol: %d" % proto
ValueError: unsupported pickle protocol: 3

How can I fix this?

Thank you.

[Andrea Palazzi]

Hi @nxnam714 ,

this looks a python2/3 compatibility issue. I see you're using python2. Please run the script with python3 and let me know if the issue was solved.

I plan to put some requirements in the readme to avoid this kind of issues.