python使用UTF-8写入CSV中文乱码

使用encoding=‘utf-8’，写入的文档是乱码：

def save_contents(urlist):     with open("filename"+".csv","a+",newline='', encoding='utf-8') as f:         writer = csv.writer(f)         for i in range(len(urlist)):             writer.writerow(urlist[i])

解决方法：修改 encoding=‘utf-8-sig’：

def save_contents(urlist):     with open("filename"+".csv","a+",newline='', encoding='utf-8-sig') as f:         writer = csv.writer(f)         for i in range(len(urlist)):             writer.writerow(urlist[i])