2

尝试使用 API 打印 Yahoo 搜索的结果时，For 循环计数器不会打印其增加的值。XML 被解析和打印，但计数器一遍又一遍地打印“1”。

相同的代码适用于 Bing API。

for counter1 in range(50):
    try:
        for Result in YahooSearchResultsXML.getElementsByTagName('Result'):
            try:
                Yahoo_PageTitle = Result.getElementsByTagName('Title')[counter1].firstChild.toxml(encoding="utf-8")
            except AttributeError:
                Yahoo_PageTitle = "Sorry, no page title provided..." 
            try:
                Yahoo_PageDesc = Result.getElementsByTagName('Summary')[counter1].firstChild.toxml(encoding="utf-8")
            except AttributeError:
                Yahoo_PageDesc = "Sorry, no page description provided..."
            Yahoo_DisplayURL = Result.getElementsByTagName('DisplayUrl')[counter1].firstChild.toxml(encoding="utf-8")
            Yahoo_URL = Result.getElementsByTagName('ClickUrl')[counter1].firstChild.toxml(encoding="utf-8")
            ##  Print the output to ensure it's working.
            print counter1+1
            print "<br />"
            print "<h2>" + Yahoo_PageTitle + "</h2>"
            print Yahoo_PageDesc + "<br />"
            print Yahoo_DisplayURL + "<br />"
            print Yahoo_URL + "<br />"
            print "<p> ----------------------------------------------------------------------------------------------------------------- </p>"
    except IndexError:
        print "Exiting@IndexError handler"
        break
    Yahoo_Score = counter1 + 1

建议赞赏，现在已经看这个代码太久了。

4

2 回答 2

0

正如上面所写，打印在for Result in..循环中。如果您有多个结果，您将获得具有相同内容的多行。

另外，try不应该缩进吗？（这是固定的）

编辑：根据我们收集的信息，您需要在内部循环中增加该计数器。您编写它的方式（for counter1 in range(50)）将在外循环中增加它。

试试这个（注意标识变化）：

    counter1 = 0
    try:
        for Result in YahooSearchResultsXML.getElementsByTagName('Result'):
            try:
                Yahoo_PageTitle = Result.getElementsByTagName('Title')[counter1].firstChild.toxml(encoding="utf-8")
            except AttributeError:
                Yahoo_PageTitle = "Sorry, no page title provided..." 
            try:
                Yahoo_PageDesc = Result.getElementsByTagName('Summary')[counter1].firstChild.toxml(encoding="utf-8")
            except AttributeError:
                Yahoo_PageDesc = "Sorry, no page description provided..."
            Yahoo_DisplayURL = Result.getElementsByTagName('DisplayUrl')[counter1].firstChild.toxml(encoding="utf-8")
            Yahoo_URL = Result.getElementsByTagName('ClickUrl')[counter1].firstChild.toxml(encoding="utf-8")
            ##  Print the output to ensure it's working.
            print counter1+1
            counter1 += 1
            print "<br />"
            print "<h2>" + Yahoo_PageTitle + "</h2>"
            print Yahoo_PageDesc + "<br />"
            print Yahoo_DisplayURL + "<br />"
            print Yahoo_URL + "<br />"
            print "<p> ----------------------------------------------------------------------------------------------------------------- </p>"
    except IndexError:
        print "Exiting@IndexError handler"
        break
    Yahoo_Score = counter1 + 1
于 2011-07-18T07:39:15.523 回答
0

你确定你有超过1 Title///在每个Summary？当 counter 的值达到 1 时，如果XML 中的某处没有第二个 /etc 元素，您将跳转到处理程序并跳出循环。DisplayUrlClickUrlResultTitleIndexError

于 2011-07-18T07:41:48.160 回答