获取空白文件，尝试将Beautifulsoup数据导入到csv中

Question

不知道发生了什么。它与导入到csv文件的其他代码完美配合。但是以某种方式不能传递数据。它会创建文件，但为空白。

如果有人可以给小费，将不胜感激。很有可能这只是一个简单的解决方案，因为我是新手。

from urllib.request import urlopen as uReq
from bs4 import BeautifulSoup as soup
import re
import csv
filename = "test.csv"
f = open(filename, "a")
headers = "location, country, type, level, deep, vision, water, 
access, life kind \n"
f.write(headers)
my_url = "http://www.example.com"
uClient = uReq(my_url)
page_html = uClient.read()
uClient.close()
page_soup = soup(page_html, "html.parser")
links = page_soup.select('sea > a[href]')
link = [tag.get('href') for tag in links]
for url in link:
    Client = uReq(url)
    pageHtml = Client.read()
    Client.close()  
    pSoup = soup(pageHtml, "html.parser")
    linkeas = pSoup.findAll(href=re.compile(my_url))
    def linkas(href):
        return href and re.compile("html").search(href) and re.compile(my_url).search(href)
    linka = pSoup.findAll(href=linkas)
    if linka != []:
        linkia = [tag.get('href') for tag in linka]
        for curl in linkia:
            cClient = uReq(curl)
            pageHtml = cClient.read()
            cClient.close() 
            Soup = soup(pageHtml, "html.parser")
            info = Soup.select('.val')
            if info != None:
                location = Soup.select('.last')
                if location[0].string != 'Page 2':
                    country = Soup.select('.cru > a:nth-of-type(3)')
                    countri = country[0].text.strip()
                    print(countri)
                    locat = location[0].text.strip()
                    print(locat)
                    tipo = info[0].text.strip()
                    print(tipo)
                    expe = info[1].text.strip()
                    print(expe)
                    depth = info[2].text.strip()
                    print(depth)
                    avg = info[3].text.strip()
                    print(avg)
                    cur = info[4].text.strip()
                    print(tipo)
                    acc = info[5].text.strip()
                    print(acc)
                    life = info[6].text.strip()
                    print(life) 
                    f.write(locat.replace(",", " |") + "," + countri.replace(",", " |") + ","  + tipo.replace(",", " |") + "," + expe.replace(",", " |") + "," + depth.replace(",", " |") + "," + avg.replace(",", " |") + "," + cur.replace(",", " |") + "," + acc.replace(",", " |") + "," + life.replace(",", " |") + "\n")
                    continue
                else:
                    continue