import urllib.request def gt(url): # 字节单位 fb = int(urllib.request.urlopen(url).headers['Content-Length']) # KB单位,保留两位小数 fk = "%.2f"%(fb/1024) return {"bytes":fb,"KB":fk} print(gt("https://pic.cnblogs.com/avatar/2635562/20211115174245.png"))