我正在尝试从http://projects.fivethirtyeight.com/election-2016/delegate-targets/底部的表中获取数据。
import requests
from lxml import html
url = "http://projects.fivethirtyeight.com/election-2016/delegate-targets/"
response = requests.get(url)
doc = html.fromstring(response.text)
tables = doc.findall('.//table[@class="delegates desktop"]')
election = tables[0]
election_rows = election.findall('.//tr')
def extractCells(row, isHeader=False):
if isHeader:
cells = row.findall('.//th')
else:
cells = row.findall('.//td')
return [val.text_content() for val in cells]
import pandas
def parse_options_data(table):
rows = table.findall(".//tr")
header = extractCells(rows[1], isHeader=True)
data = [extractCells(row, isHeader=False) for row in rows[2:]]
return pandas.DataFrame(data, columns=header)
election_data = parse_options_data(election)
election_data
我遇到了候选人姓名最高的一行('特朗普','克鲁兹','卡西奇')。它在tr class =“top”下,现在我只有tr class =“bottom”(以“won / target”行开头)。
非常感谢任何帮助!
答案 0 :(得分:0)
候选人姓名在第0行:
candidates = [val.text_content() for val in rows[0].findall('.//th')[1:]]
或者,如果重复使用相同的extractCells()
函数:
candidates = extractCells(rows[0], isHeader=True)[1:]
这里的 [1:]
切片是跳过第一个空的th
单元格。
答案 1 :(得分:0)
不好(硬编码),但按照你想要的方式运行。
def parse_options_data(table):
rows = table.findall(".//tr")
candidate = extractCells(rows[0], isHeader=True)[1:]
header = extractCells(rows[1], isHeader=True)[:3] + candidate
data = [extractCells(row, isHeader=False) for row in rows[2:]]
return pandas.DataFrame(data, columns=header)