美丽的汤从ID获取文本

Question

我尝试使用BeautifulSoup捕获id的文本。结果应该是30,66。

我的实际代码显示了完整的span元素：

[<span class="mainValueAmount simpleTextFit" id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldValue">30,66</span>]

如何只得到30,66的值？

from bs4 import BeautifulSoup

u = '<div class="widgetBox" data-name="pvEnergy"><div class="widgetHead">PV-Energie</div><div class="widgetBody"><div class="mainValue"><span id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldValue" class="mainValueAmount simpleTextFit">30,66</span><span id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldUnit" class="mainValueUnit">kWh</span><br><span id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldPeriodTitle" class="mainValueDescription">Heute</span></div></div><div id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldTotalDiv" class="widgetFooter">Gesamt:&nbsp;<span id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldTotalValue">158,953</span><span id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldTotalUnit">MWh</span></div></div>'

idAktWert = 'ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldValue'

soup = BeautifulSoup(u, "html.parser")

aktWert = soup.select("#" + idAktWert)

print(aktWert)

感谢您的帮助！

Answer 1

使用.text

例如：

from bs4 import BeautifulSoup

u = '<div class="widgetBox" data-name="pvEnergy"><div class="widgetHead">PV-Energie</div><div class="widgetBody"><div class="mainValue"><span id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldValue" class="mainValueAmount simpleTextFit">30,66</span><span id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldUnit" class="mainValueUnit">kWh</span><br><span id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldPeriodTitle" class="mainValueDescription">Heute</span></div></div><div id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldTotalDiv" class="widgetFooter">Gesamt:&nbsp;<span id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldTotalValue">158,953</span><span id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldTotalUnit">MWh</span></div></div>'
idAktWert = 'ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldValue'
soup = BeautifulSoup(u, "html.parser")
aktWert = soup.select("#" + idAktWert)[0]    #Note: I have used Index to select the first element in list. 
print(aktWert.text)

输出：

30,66

Answer 2

您只需要get_text()。

from bs4 import BeautifulSoup

u = '<div class="widgetBox" data-name="pvEnergy"><div class="widgetHead">PV-Energie</div><div class="widgetBody"><div class="mainValue"><span id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldValue" class="mainValueAmount simpleTextFit">30,66</span><span id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldUnit" class="mainValueUnit">kWh</span><br><span id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldPeriodTitle" class="mainValueDescription">Heute</span></div></div><div id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldTotalDiv" class="widgetFooter">Gesamt:&nbsp;<span id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldTotalValue">158,953</span><span id="ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldTotalUnit">MWh</span></div></div>'

idAktWert = 'ctl00_ContentPlaceHolder1_PublicPagePlaceholder1_PageUserControl_ctl00_PublicPageLoadFixPage_energyYieldWidget_energyYieldValue'

soup = BeautifulSoup(u, "html.parser")

aktWert = soup.select("#" + idAktWert)
// since aktWert is an array, we need to get the 1st index
print(aktWert[0].get_text()) // outputs 30,66