python - 在不起眼的标签之间抓取文本

Question

在某些情况下，我的文本介于在整个文件中多次重复出现的模糊值和属性之间(例如，“'”被重复使用)。

最终，我想提取:“Prev Close:”和“565.07”，并将这些信息放入字符串或列表之类的内容中(请提出建议 ).

---

部分相关 HTML 源代码:

<div class="yui-u first yfi-start-content"><div class="yfi_quote_summary"><div id="yfi_quote_summary_data" class="rtq_table"><table id="table1"><tr><th scope="row" width="48%">Prev Close:</th><td class="yfnc_tabledata1">565.07</td></tr>

---

我的代码(Python 3.4.1):

soup = BeautifulSoup(data) # data contains the HTML source

FirstTable_tag = soup.find('div', attrs={'class': '"yui-u first yfi-start-content"'})
# Should the keys (attributes) in the "findNextSibling parameters below be filled in or left empty???
next_FirstTable_tag = FirstTable_tag.findNextSibling('div', attrs={'class': '"yfi_quote_summary"'})     
next_next_FirstTable_tag = next_FirstTable_tag.findNextSibling('div', attrs={'id': '"yfi_quote_sumary_data"', 'class': '"rtq_table"'})
next_next_next_FirstTable_tag = next_next_FirstTable_tag.findNextSibling('table', attrs={'id': '"table1"'})
data = next_next_next_FirstTable_tag.get_text()

SelectSoup = BeautifulSoup(data)
print("SelectSoup:" + SelectSoup + "(should be:  Prev Close)")

---

错误

Traceback (most recent call last):
    next_FirstTable_tag = FirstTable_tag.findNextSibling          
AttributeError: 'NoneType' object has no attribute 'findNextSibling'
<<< Process finished. (Exit code 1)

---

编辑

Here is the initial and full source as requested

尽管我已经转而使用 Yahoo 的 API，这显然是一种更好的方法，但出于好奇，我仍在尝试在 @scandinavian_ 的帮助下完成搜索

我更新了上面的代码，但我仍然遇到同样的错误。

---

编辑2

此后这篇文章将重点关注@scandinavian_ 正在协助开发的解决方案:

import sys
import urllib.request
url = "http://finance.yahoo.com/q?s=GOOG"
urlRunner = urllib.request.urlopen(url)
data = urlRunner.read()

from bs4 import BeautifulSoup
soup = BeautifulSoup(data)

import re
tables = soup.findAll("table", id = re.compile('^table'))
result = {}
for table in tables:
    for th, td in zip(table.findAll("th"), table.findAll("td")):
        result[th.text] = td.text
print(result)

结果:

{'52wk Range:': '502.80 - 604.83', 'Market Cap:': '381.04B', 'Next Earnings Date:': 'N/A', 'P/E (ttm) :': '29.52', 'Avg Vol (3m):': '1,701,610', 'EPS (ttm):': '19.09', '1y Target Est:': 'N/A', 'Volume:': '561,384', 'Ask:': '563.98 x 100', 'Div & Yield:': 'N/A (N/A) ', 'Bid:': '563.56 x 100', 'Beta:': ' 1.144', 'Open:': '568.00', "Day's Range:": '562.53 - 569.77', 'Prev Close:': '566.37'}

Answer 1

这是基于我认为你想要的，但如果没有适当的数据样本就不可能说。我猜不出它是如何构成的。在你的描述中，听起来数据是不规则的，这在你的样本中是看不到的。

from bs4 import BeautifulSoup
from itertools import izip

html = """<div class="yui-u first yfi-start-content">
    <div class="yfi_quote_summary">
        <div id="yfi_quote_summary_data" class="rtq_table">
            <table id="table1">
                <tr>
                    <th scope="row" width="48%">Target Point:</th>
                    <td class="yfnc_tabledata1">200.22</td>
                </tr>
                <tr>
                    <th scope="row" width="48%">Target Point:</th>
                    <td class="yfnc_tabledata1">200.22</td>
                </tr>
                <tr>
                    <th scope="row" width="48%">Target Point:</th>
                    <td class="yfnc_tabledata1">200.22</td>
                </tr>
            </table>
        </div>
    </div>
</div>"""

bs = BeautifulSoup(html)

result = {}

ths = bs.findAll("th")
tds = bs.findAll("td")
elements = izip(ths, tds)

result = []

for x, y in elements:
    result.append((x.text, y.text))

print result

编辑:

Yahoo API 解决方案，请考虑改用这个:

import requests

URL = "https://query.yahooapis.com/v1/public/yql"

query = 'select * from yahoo.finance.quotes where symbol in ("GOOG")'

params = {
    "q": query,
    "format": "json",
    "env": "store://datatables.org/alltableswithkeys"
}

data = requests.get(URL, params=params).json()

print data['query']['results']['quote']['PreviousClose']
print data['query']['results']['quote']['Open']

这将打印:

565.07
561.78

这些是股票的可用数据:

AfterHoursChangeRealtime
AnnualizedGain
Ask
AskRealtime
AverageDailyVolume
Bid
BidRealtime
BookValue
Change
Change_PercentChange
ChangeFromFiftydayMovingAverage
ChangeFromTwoHundreddayMovingAverage
ChangeFromYearHigh
ChangeFromYearLow
ChangeinPercent
ChangePercentRealtime
ChangeRealtime
Commission
Currency
DaysHigh
DaysLow
DaysRange
DaysRangeRealtime
DaysValueChange
DaysValueChangeRealtime
DividendPayDate
DividendShare
DividendYield
EarningsShare
EBITDA
EPSEstimateCurrentYear
EPSEstimateNextQuarter
EPSEstimateNextYear
ErrorIndicationreturnedforsymbolchangedinvalid
ExDividendDate
FiftydayMovingAverage
HighLimit
HoldingsGain
HoldingsGainPercent
HoldingsGainPercentRealtime
HoldingsGainRealtime
HoldingsValue
HoldingsValueRealtime
LastTradeDate
LastTradePriceOnly
LastTradeRealtimeWithTime
LastTradeTime
LastTradeWithTime
LowLimit
MarketCapitalization
MarketCapRealtime
MoreInfo
Name
Notes
OneyrTargetPrice
Open
OrderBookRealtime
PEGRatio
PERatio
PERatioRealtime
PercebtChangeFromYearHigh
PercentChange
PercentChangeFromFiftydayMovingAverage
PercentChangeFromTwoHundreddayMovingAverage
PercentChangeFromYearLow
PreviousClose
PriceBook
PriceEPSEstimateCurrentYear
PriceEPSEstimateNextYear
PricePaid
PriceSales
SharesOwned
ShortRatio
StockExchange
symbol
Symbol
TickerTrend
TradeDate
TwoHundreddayMovingAverage
Volume
YearHigh
YearLow
YearRange