yolov8 labelme制作json数据集转化为segment需要的txt格式

# 思路：
import json,shutil
from decimal import Decimal
import os,shutil

def json_to_txt_v8(path_A,path_B):
    set_A = set(i.split('.')[0] for i in os.listdir(path_A))
    
    for i in set_A:
        if i == "":
            pass
        else:
            name = os.path.join(path_A, i + '.json')
            print("name", name)
            save_name = os.path.join(path_B, i + '.txt')
            print("save_name", save_name)
            with open(name, 'r') as f:
                    data = json.load(f)
                    print("" + data.get('version'))
                    print("flags略")
                    print("shapes略")
                    print("" + data.get('imagePath'))
                    print("imageData=略" )
                    print(""+str(data['imageHeight']))
                    print(""+str(data['imageWidth']))
                    H=data.get('imageHeight')
                    W=data.get('imageWidth')
                    classes=["a","b","c","d","e","f"]
                    locals_items = data['shapes'][0].keys()
                    print("locals_items=",locals_items)
                    for k in data['shapes']:
                #bug  下标不在列表中
                            point_arr=[]
                            label_index=list(classes).index(str(k['label']))
                            point_arr.append(str(label_index))
                           # print('标签索引序号',label_index)
                            points_contexts = (k['points'])
                         #   print(points_contexts)
                          #  print("点的个数=", len(points_contexts))
                            for i in range(len(points_contexts)):
                                x_Value = Decimal(str(round(float((points_contexts[i][0]) / (W)), 6))).quantize(Decimal('0.000000'))
                                y_Value = Decimal(str(round(float((points_contexts[i][1]) / (H)), 6))).quantize(Decimal('0.000000'))
                                point_arr.append(str(x_Value))
                                point_arr.append(str(y_Value))
                                # print(points_contexts[i])
                                # print(x_Value)
                                # print(y_Value)
                           # print(point_arr)
                            with open(save_name, 'a+') as ww:
                                for i in range(len(point_arr)):
                                #    print(point_arr[i])
                                    ww.write(point_arr[i])
                                    ww.write(' ')
                                ww.write('\n')
if __name__== "__main__" :
    path_A='./json'
    path_B='./txt'
    if not os.path.exists(path_A):
        print("搞笑吗，需要转的json文件夹不存在，请查看路径")
    else:
        if not os.path.exists(path_B):
            os.makedirs(path_B)
            json_to_txt_v8(path_A,path_B)
        else:
            shutil.rmtree(path_B)
            os.makedirs(path_B)
            json_to_txt_v8(path_A,path_B)