修改后的代码如下：
import urllib.requestimport jsonfrom pyecharts import options as optsfrom pyecharts.charts import Graph# 下载json文件url = "http://i9000.net:8888/sgn/LMS/Visual/8/weibo-2.json"save_path = "weibo-2.json"urllib.request.urlretrieve(url, save_path)# 读取json文件并绘制关系图with open("weibo-2.json", "r", encoding="utf-8") as f:j = json.load(f)nodes, links, categories, cont, mid, userl = jc = (Graph().add("",nodes,links,categories,repulsion=50,linestyle_opts=opts.LineStyleOpts(curve=0.2),label_opts=opts.LabelOpts(is_show=False),).set_global_opts(legend_opts=opts.LegendOpts(is_show=False),title_opts=opts.TitleOpts(title="Graph-微博转发关系图"),).render("graph_weibo.html"))
请确保已安装所需的依赖库，并在运行代码之前进行相应的导入。
内容由零声教学AI助手提供，问题来源于学员提问
