print ("successfully converted {}-labels from mat to pascal-xml").format(directory) AttributeError: 'NoneType' object has no attribute 'format'

[monajalal]

Hey when I ran mat_to_xml.py I got this error:

mona@Mona:~/code/handpose/deeptraining_hands$ python mat_to_xml.py 
successfully converted {}-labels from mat to pascal-xml
Traceback (most recent call last):
  File "mat_to_xml.py", line 213, in <module>
    main()
  File "mat_to_xml.py", line 209, in main
    print ("successfully converted {}-labels from mat to pascal-xml").format(directory)
AttributeError: 'NoneType' object has no attribute 'format'

how should this be fixed?

[gustavz]

There really should no issue on the call of format(directory) as this is the string the loop iterates over.
as the code in main() is:

def main():
    # Read a .mat file and convert it to a pascal format
    for directory in ['train','eval']:

        if not os.path.exists('data/{}/annotations/xml'.format(directory)):
            os.makedirs('data/{}/annotations/xml'.format(directory))

        MAT_FILES_PATH = os.path.join(os.getcwd(), 'data/{}/annotations/mat'.format(directory))
        XML_FILES_PATH = os.path.join(os.getcwd(), 'data/{}/annotations/xml'.format(directory))
        IMG_FILES_PATH = os.path.join(os.getcwd(), 'data/{}/images'.format(directory))

        # List all files in the MAT_FILES_PATH and ignore hidden files (.DS_STORE for Macs)
        mat_files = [[join(MAT_FILES_PATH, x), x] for x in os.listdir(MAT_FILES_PATH) if isfile(join(MAT_FILES_PATH, x)) and x[0] is not '.']
        mat_files.sort()
	
        # Iterate through all files and convert them to XML
        for mat_file in mat_files:
            #print(mat_file)
            read_mat_file(mat_file[0], mat_file[1],IMG_FILES_PATH, XML_FILES_PATH)
            #break
        print ("successfully converted {}-labels from mat to pascal-xml").format(directory)
    cv2.destroyAllWindows()

My questions:

1. Did you change my code?
2. Did you successfully run the dataset setup scripts?
3. Which python version are you using?

[Divyanshupy]

@monajalal you are facing this issue because in the last print the syntax is wrong for python 3.
It is written like this
print ("successfully converted {}-labels from mat to pascal-xml").format(directory)
but should actually be
print ("successfully converted {}-labels from mat to pascal-xml".format(directory))
I hope this helps.