python列表删除中括号 python列表怎么去掉中括号

import json

js_file = './thermal_annotations.json'

with open(js_file,'r') as f:
     js = json.load(f)
     #print(label)

     label_info = js['info']
     print(label_info)

     for annotation in js["annotations"]:
         #print(annotation['segmentation'])
         seg = annotation['segmentation']
         #print(seg[0])
         print("-".join( repr(e) for e  in seg[0]))

　　

convert

[[ 266,220,266,258,280,258,280,220]]

to

266-220-266-258-280-258-280-220