问题描述：使用Python代码将txt城市列表文件转换为xls文件，源码如下，

#!/usr/bin/env Python
# coding=utf-8
import os
import json
import xlwt

# 存放文件的目录
filepath = '/home/tarena/python/20180312'


def run():
    os.chdir(filepath)
    # 读取文件内容
    with open('city.txt') as f:
        content = f.read()
    # 转为json
    d = json.loads(content)
    file = xlwt.Workbook()
    # 添加sheet
    table = file.add_sheet('test')
    for row, i in enumerate(list(d)):
        table.write(row, 0, i)
        table.write(row, 1, d[i])
    file.save('city.xls')

if __name__ == "__main__":
    run()

会报：json.decoder.JSONDecodeError: Unexpected UTF-8 BOM (decode using utf-8-sig): line 1 column 1 (char 0)错误，分析原因是因为txt文件包含BOM字符，去掉BOM字符，在

content = f.read()代码下加上

    if content.startswith(u'\ufeff'):
            content = content.encode('utf8')[3:].decode('utf8')