python - XPath 删除列表 Python 中的空格

Question

我已经尝试了我所知道的一切，但似乎找不到解决方案。

import csv
import requests
from lxml import html
from itertools import izip

list_names_atp = []
page = requests.get('http://www.atpworldtour.com/en/rankings/singles')
tree = html.fromstring(page.content)

list_rank_atp = []
for i in range(0,101):
    result = tree.xpath('//*[@id="rankingDetailAjaxContainer"]/table/tbody/tr[%s]/td[1]/text()'%(i))
    list_rank_atp.append(result)

list_names_atp = []
for i in range(0,101):
    result1 = tree.xpath('//*[@id="rankingDetailAjaxContainer"]/table/tbody/tr[%s]/td[4]/a/text()'%(i))
    list_names_atp.append(result1)

list_Final =[]
for i in izip(list_rank_atp, list_names_atp):
    uitkom = i
    list_Final.append(uitkom)

outfile = open("./tennis.csv", "wb")
writer = csv.writer(outfile)
writer.writerow(["Rank", "Name"])
writer.writerows(list_Final)    

csv 输出如下:

但我希望它是:

Answer 1

以下是一些注释:

• XPath 索引从 1 开始，而不是从 0 开始。这就是为什么第一个数据行的条目为空。

• 您可以使用 Python 的 strip() 或 XPath 的 normalize-space() 删除行号文本周围的空格

我建议迭代行(tr)并在每次迭代中从当前行获取所需的所有信息:

page = requests.get('http://www.atpworldtour.com/en/rankings/singles')
tree = html.fromstring(page.content)
outfile = open("./tennis.csv", "wb")
writer = csv.writer(outfile)

rows = tree.xpath('//*[@id="rankingDetailAjaxContainer"]/table/tbody/tr')
writer.writerow(["Rank", "Name"])

for row in rows:
    no = row.xpath('td[1]/text()')[0].strip()
    name = row.xpath('td[4]/a/text()')[0]
    writer.writerow([no, name])

outfile.close()