lxml xpath - 获取跨度标签内的所有文本答案

【问题标题】：lxml xpath - Get all text within span tagslxml xpath - 获取跨度标签内的所有文本
【发布时间】：2015-11-06 03:44:15
【问题描述】：

我正在尝试抓取看起来像这样的页面，每组有 3 个或更多跨度标签。目标是获取字典列表：

{'ctl02_lblAppearanceInfo1': 'Text',
'ctl02_lblAppearanceInfo2': 'Text'}

html:

<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl02_lblAppearanceInfo1" class="ParamText"> TEXT HERE..............   </span>

<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl02_lblAppearanceInfo2" class="ParamText"> TEXT HERE.............</span>

<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl02_lblAppSpace" class="ParamText">TEXT HERE..........</span>


<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl03_lblAppearanceInfo1" class="ParamText"> TEXT HERE..............</span>

<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl03_lblAppearanceInfo2" class="ParamText"> TEXT HERE.............</span>

<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl03_lblAppSpace" class="ParamText">TEXT HERE..........</span>


<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl04_lblAppearanceInfo1" class="ParamText"> TEXT HERE..............</span>

<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl04_lblAppearanceInfo2" class="ParamText"> TEXT HERE.............</span>

<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl04_lblAppSpace" class="ParamText">TEXT HERE..........</span>

我用过

tree.xpath('//span[starts-with(@id, "ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl")]')

成功，因为它返回一个带有 id 和 text 属性的元素对象，但如果我遇到这样的事情：

<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl02_lblAppearanceInfo1" class="ParamText">
TEXT LINE 1
<br>TEXT LINE 2
<br>TEXT LINE 3
<br>TEXT LINE 4</span>

它只会返回“TEXT LINE 1”

【问题讨论】：

标签： python xpath lxml

【解决方案1】：

使用 contains() 和 text()。

代码如下：

from lxml import html

HTML = """<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl02_lblAppearanceInfo1" class="ParamText"> TEXT HERE 1..............   </span>
<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl02_lblAppearanceInfo2" class="ParamText"> TEXT HERE 2..............</span>
<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl02_lblAppSpace" class="ParamText">TEXT HERE 3..............</span>
<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl03_lblAppearanceInfo1" class="ParamText"> TEXT HERE 4..............</span>
<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl03_lblAppearanceInfo2" class="ParamText"> TEXT HERE 5..............</span>
<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl03_lblAppSpace" class="ParamText">TEXT HERE 6..............</span>
<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl04_lblAppearanceInfo1" class="ParamText"> TEXT HERE 7..............</span>
<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl04_lblAppearanceInfo2" class="ParamText"> TEXT HERE 8..............</span>
<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl04_lblAppSpace" class="ParamText">TEXT HERE 9..............</span>
<span id="ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl02_lblAppearanceInfo1" class="ParamText">
TEXT LINE 10.............
<br>TEXT LINE 11.............
<br>TEXT LINE 12.............
<br>TEXT LINE 13.............</span>
"""

tree = html.fromstring(HTML)
text_lines = tree.xpath('//span[contains(@id, "ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl")]')

results = dict()

for i, text_line in enumerate(text_lines):
    span_id = text_line.xpath('.//@id')[0]
    span_text = [x.strip() for x in text_line.xpath('.//text()')]
    results[i] = dict(id=span_id, texts=span_text)

print results

输出：

{
    0: {
        'texts': ['TEXT HERE 1..............'],
        'id': 'ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl02_lblAppearanceInfo1'
    },
    1: {
        'texts': ['TEXT HERE 2..............'],
        'id': 'ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl02_lblAppearanceInfo2'
    },
    2: {
        'texts': ['TEXT HERE 3..............'],
        'id': 'ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl02_lblAppSpace'
    },
    3: {
        'texts': ['TEXT HERE 4..............'],
        'id': 'ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl03_lblAppearanceInfo1'
    },
    4: {
        'texts': ['TEXT HERE 5..............'],
        'id': 'ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl03_lblAppearanceInfo2'
    },
    5: {
        'texts': ['TEXT HERE 6..............'],
        'id': 'ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl03_lblAppSpace'
    },
    6: {
        'texts': ['TEXT HERE 7..............'],
        'id': 'ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl04_lblAppearanceInfo1'
    },
    7: {
        'texts': ['TEXT HERE 8..............'],
        'id': 'ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl04_lblAppearanceInfo2'
    },
    8: {
        'texts': ['TEXT HERE 9..............'],
        'id': 'ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl04_lblAppSpace'
    },
    9: {
        'texts': ['TEXT LINE 10.............', 'TEXT LINE 11.............', 'TEXT LINE 12.............', 'TEXT LINE 13.............'],
        'id': 'ctl00_ContentPlaceHolder1_CaseDetailParties1_gvParties_ctl02_gvAttyInfo_ctl02_lblAppearanceInfo1'
    }
}

【讨论】：