arrays - JSONDecodeError; Invalid /escape when parsing from Python

Question

After running my object detection model, it outputs a .json file with the results. In order to actually use the results of the model in my python I need to parse the .json file, but nothing I have tried in order to do it works. I tried just to open and then print the results but I got the error:

json.decoder.JSONDecodeError: Invalid escape: line 4 column 41 (char 60)

If you have any idea what I did wrong, the help would be very much appreciated. My code:

with open(r'C:Yolo_v4darknetuilddarknetx64
esult.json') as result:
    data = json.load(result)
    result.close()

print(data)

My .json file

[
{
 "frame_id":1, 
 "filename":"C:Yolo_v4darknetuilddarknetx64f047.png", 
 "objects": [ 
  {"class_id":32, "name":"right", "relative_coordinates":{"center_x":0.831927, "center_y":0.202225, "width":0.418463, "height":0.034752}, "confidence":0.976091}, 
  {"class_id":19, "name":"h", "relative_coordinates":{"center_x":0.014761, "center_y":0.873551, "width":0.041723, "height":0.070544}, "confidence":0.484339}, 
  {"class_id":24, "name":"left", "relative_coordinates":{"center_x":0.285694, "center_y":0.200752, "width":0.619584, "height":0.032149}, "confidence":0.646595}, 
 ] 
}
]

(There are several more detected objects but did not include them)

question from:https://stackoverflow.com/questions/65910282/jsondecodeerror-invalid-escape-when-parsing-from-python

Answer 1

Hi you need to use double (backslashes), remove the last comma in the objects property and finally you dont need close the file inside the with block

[
{
 "frame_id":1, 
 "filename":"C:\Yolo_v4\darknet\build\darknet\x64\f047.png", 
 "objects": [ 
    {"class_id":32, "name":"right", "relative_coordinates":{"center_x":0.831927,     "center_y":0.202225, "width":0.418463, "height":0.034752}, "confidence":0.976091}, 
    {"class_id":19, "name":"h", "relative_coordinates":{"center_x":0.014761,     "center_y":0.873551, "width":0.041723, "height":0.070544}, "confidence":0.484339}, 
    {"class_id":24, "name":"left", "relative_coordinates":{"center_x":0.285694,     "center_y":0.200752, "width":0.619584, "height":0.032149}, "confidence":0.646595}
 ] 
}
]