Few problems

[SperenzaNarra]

THIS PROGRAM HAVE TO RUN WITH Python3.8 instead of 3.10, if unable to solve the problem, please make a detection of python version

You should notice people they can build default labels before opening files I edit the function in the labelImg.py

    def load_predefined_classes(self, predef_classes_file):
        if os.path.exists(predef_classes_file) is True:
            with codecs.open(predef_classes_file, 'r', 'utf8') as f:
                for line in f:
                    line = line.strip()
                    if self.label_hist is None:
                        self.label_hist = [line]
                    else:
                        self.label_hist.append(line)
                print(f"INFO: {predef_classes_file} is loaded")
        if self.label_hist is None:
            print(f"INFO: Empty or {predef_classes_file} not found, you can edit for building default labels")

Also, this app crashed because I don't have enough lines in the labels/classes.txt file, you should notice people to solve the problem. yolo_io.py

class YoloReader:

    def __init__(self, file_path, image, class_list_path=None):
        # shapes type:
        # [label, [(x1,y1), (x2,y2), (x3,y3), (x4,y4)], color, color, difficult]
        self.shapes = []
        self.file_path = file_path
        ...

    def yolo_line_to_shape(self, class_index, x_center, y_center, w, h):
        try:
            label = self.classes[int(class_index)]
        except IndexError as e:
            class_path = os.path.join(os.path.dirname(os.path.abspath(self.file_path)), "classes.txt")
            raise type(e)(f"{e}, failed to reach classes[{class_index}], please try to update {class_path}")