爬虫代码，想写入文件，但写不进，可以运行，不知道什么问题

import time
import re
import requests

#请求头伪装浏览器
headers = {
    'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64)\
     AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.\
     3396.99 Safari/537.36'
    }

#初始化列表，转入爬虫信息
info_lists = []

#判断用户性别函数
def judgment_sex(class_name):
    if class_name == "manIcon":
        return '男'
    else:
        return '女'

#获取信息
def get_info(url):
    res = requests.get(url,headers = headers)
    ids = re.findall('<h2>(.*?)</h2>',res.text,re.S)
    levels = re.findall('<div class="articleGender \D+Icon">\
                        (.*?)</div>',res.text,re.S)
    sexs = re.findall('<div class="articleGender (.*?)"',
                      res.text,re.S)
    contents = re.findall('<span>(.*?)</span>',res.text,re.S)
    laughs = re.findall('<span class="stats-vote"><i class=\
                        "number">(\d+)</i> 好笑</span>',res.
                        text,re.S)
    comments = re.findall('<i class="number">(\d+)</i> 评论'
                          ,res.text,re.S)
    for id,level,sex,content,laugh,comment in zip(ids,levels,
                            sexs,contents,laughs,comments):
        info = {
            'id' : id,
            'level' : level,
            'sex' : judgment_sex(sex),
            'content' : content,
            'laugh' : laugh,
            'comment' : comment
            }
        info_lists.append(info)

urls = ['https://www.{}/'.format(
         str(i)) for i in range(1,14)]

for url in urls:
    get_info(url)
    time.sleep(1)

#写入文件
for info_list in info_lists:
    f = open('.\qiushi.txt','a+')
    try:
        f.write(info_list['id'] + '\n')
        f.write(info_list['level'] + '\n')
        f.write(info_list['sex'] + '\n')
        f.write(info_list['content'] + '\n')
        f.write(info_list['laugh'] + '\n')
        f.write(info_list['comment'] + '\n\n')
        f.close()
    except UnicodeEncodeError:
        pass