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1 # -*- coding:utf-8 -*- 2 ''' 3 Created on Sep 10, 2018 4 5 @author: SaShuangYiBing 6 ''' 7 from lxml import etree 8 9 html=''' 10 11 12 哈哈测试一下 13 14... ......
1 # -*- coding:utf-8 -*-
2 '''
3 created on sep 10, 2018
4
5 @author: sashuangyibing
6 '''
7 from lxml import etree
8
9 html='''
10 <html>
11 <head>
12 <title>哈哈测试一下</title>
13 <link type="text/css" rel="stylesheet" href="haha.css" />
14 <link type="text/css" rel="stylesheet" href="haha1.css" />
15 <link type="text/css" rel="stylesheet" href="haha2.css" />
16 <script type="text/javascript" src="haha.js"></script>
17 <script type="text/javascript" src="haha1.js"></script>
18 <script type="text/javascript" src="haha2.js"></script>
19 </head>
20 <body>
21 <div id="id1" class="class1">
22 <div id="id2" class="class2">
23 <ul class="cls_ul1">
24 <li class="cls_li1">
25 <div class="cls_3">
26 <span>span_text1</span>
27 <span>span_text2</span>
28 <i>text_1</i>
29 </div>
30 <div>
31 <a href="a_1.html">a_1</a>
32 <a href="a_2.html">a_2</a>
33 <a href="a_3.html">a_3</a>
34 </div>
35 <div class="cls_4">
36 <a href="a_4.html">
37 <img href="a_img1.jpg" />
38 </a>
39 </div>
40 </li>
41 <li class="cls_li1">
42 <div class="cls_3">
43 <span>span_text3</span>
44 <span>span_text4</span>
45 <i>text_2</i>
46 <i>text_22</i>
47 </div>
48 <div>
49 <a href="a_4.html">a_4</a>
50 <a href="a_5.html">a_5</a>
51 <a href="a_6.html">a_6</a>
52 </div>
53 <div class="cls_4">
54 <a href="a_5.html">
55 <img href="a_img2.jpg" />
56 </a>
57 </div>
58 </li>
59 </ul>
60 </div>
61 <div id="id3" class="class3">
62 <ul class="cls_ul2">
63 <li class="cls_li2">
64 <div class="cls_5">
65 <span>span_text5</span>
66 <span>span_text6</span>
67 <i>text_3</i>
68 </div>
69 <div>
70 <a href="a_1.html">a_1</a>
71 <a href="a_2.html">a_2</a>
72 <a href="a_3.html">a_3</a>
73 </div>
74 <div class="cls_6">
75 <a href="a_4.html">
76 <img href="a_img3.jpg" />
77 </a>
78 </div>
79 </li>
80 <li class="cls_li2">
81 <div class="cls_5">
82 <span>span_text7</span>
83 <span>span_text8</span>
84 <i>text_4</i>
85 </div>
86 <div>
87 <a href="a_4.html">a_4</a>
88 <a href="a_5.html">a_5</a>
89 <a href="a_6.html">a_6</a>
90 </div>
91 <div class="cls_6">
92 <a href="a_5.html">
93 <img href="a_img4.jpg" />
94 </a>
95 </div>
96 </li>
97 </ul>
98 </div>
99 </div>
100 </body>
101 </html>
102 '''
103
104 html_data = etree.html(html)
105
106 # 1、从根节点开始，沿着xml路径一步一步选择节点，text()表示节点内容
107 content = html_data.xpath("/html/head/title/text()")
108 for con in content:
109 print (con)
110 print ("~~~~~~~~~这是第一个分隔线~~~~~~~~~")
111
112 # 2、从根节点开始，沿着xml路径一步一步选择节点，text表示节点内容
113 nodes = html_data.xpath("/html/head/title")
114 for i in nodes:
115 print (i.text)
116 print ("~~~~~~~~~这是第二个分隔线~~~~~~~~~")
117
118 # 3、从文档中某个节点开始，不考虑此节点位置，text()表示节点内容
119 content = html_data.xpath("//title/text()")
120 for con in content:
121 print (con)
122 print ("~~~~~~~~~这是第三个分隔线~~~~~~~~~")
123
124 # 4、获取所有div(html/body/div/div)的id属性值
125 nodes = html_data.xpath("/html/body/div/div")
126 for i in range(len(nodes)):
127 content = nodes[i].xpath("@id")
128 for con in content:
129 print (con)
130 print ("~~~~~~~~~这是第四个分隔线~~~~~~~~~")
131
132 # 5、body节点下某节点的属性值
133 content = html_data.xpath("body/div/div[@id= 'id2']/ul/li[1]/div[2]/a/@href")
134 for con in content:
135 print (con)
136 print ("~~~~~~~~~这是第五个分隔线~~~~~~~~~")
137
138 # 6、div[@id='id2']节点下某节点的属性值
139 content = html_data.xpath("//div[@id = 'id2']/ul/li[1]/div[2]/a/@href")
140 for con in content:
141 print (con)
142 print ("~~~~~~~~~这是第六个分隔线~~~~~~~~~")
143
144 # 7、div[@id='id2']节点下某节点的内容
145 content = html_data.xpath("//div[@id= 'id2']/ul/li[1]/div[2]/a/text()")
146 for con in content:
147 print (con)
148 print ("~~~~~~~~~这是第七个分隔线~~~~~~~~~")
149
150 # 8、用'*'来匹配任何元素
151 content = html_data.xpath("*//div[@id = 'id2']/ul/li[1]/div[2]/a/text()")
152 for con in content:
153 print (con)
154 print ("~~~~~~~~~这是第八个分隔线~~~~~~~~~")
155
156 # 9、选取多个节点
157 nodes = html_data.xpath("//i|//span")
158 for i in range(len(nodes)):
159 print (nodes[i].text)
160 print ("~~~~~~~~~这是第九个分隔线~~~~~~~~~")
161
162 # 10、选取所有li节点
163 nodes = html_data.xpath("//li")
164 for i in range(len(nodes)):
165 content = nodes[i].xpath("div/@class") # li节点下所有div节点的class属性值
166 print (i,'='*5)
167 for con in content:
168 print (con)
169 print ("~~~~~~~~~这是第十个分隔线~~~~~~~~~")
170
171 # 11、选取所有li节点
172 nodes = html_data.xpath("//li")
173 for i in range(len(nodes)):
174 content = nodes[i].xpath("div[last()]/@class") # li节点下最后一个div节点的class属性值
175 print (i, '='*5)
176 for con in content:
177 print (con)
178 print ("~~~~~~~~~这是第十一个分隔线~~~~~~~~~")
179
180 # 12、这里应用了'..'和'@'，其中'..'表示父节点，具体就是上一步(title)的父节点head；'@'表示属性，就是它后面接是属性名，在这里的意思就是属性href的内容
181 content = html_data.xpath("/html/head/title/../script/@src")
182 for con in content:
183 print (con)
184 print ("~~~~~~~~~这是第十二个分隔线~~~~~~~~~")
185
186 # 13、div[@class='cls_3']的子节点span的兄弟节点i
187 nodes = html_data.xpath("//div[@class = 'cls_3']/span/following-sibling::i")
188 for i in range(len(nodes)):
189 content = nodes[i].xpath("./text()") # 当前节点内容
190 for con in content:
191 print (con)
192 print ("~~~~~~~~~这是第十三个分隔线~~~~~~~~~")
193
194 # 14、li[@class='cls_li1']后代节点里第一个div的class属性值
195 content = html_data.xpath("//li[@class = 'cls_li1']/descendant::div[1]/@class")
196 for con in content:
197 print (con)
198 print ("~~~~~~~~~这是第十四个分隔线~~~~~~~~~")
199
200
201 # 15、li[@class='cls_li1']后代节点里span的内容
202 content = html_data.xpath("//li[@class = 'cls_li1']/descendant::span/text()")
203 for con in content:
204 print (con)
205 print ("~~~~~~~~~这是第十五个分隔线~~~~~~~~~")
206
207 # 16、用'*'来匹配任何元素，且不包含class属性的div节点
208 content = html_data.xpath("*//div[@id = 'id2']/ul/li[1]/div[not(@class)]/a/text()")
209 for con in content:
210 print (con)
211 print ("~~~~~~~~~这是第十六个分隔线~~~~~~~~~")
212
213 # 17、多个条件的情况
214 content = html_data.xpath("//div[@class= 'class1' and @id= 'id1']")
215 for con in content:
216 print (con)
217 print ("~~~~~~~~~这是第十七个分隔线~~~~~~~~~")
218
219 # 18、contains 包含的情况
220 content = html_data.xpath("//div[contains(@class,'class2')]")
221 for con in content:
222 print (con)
223 print ("~~~~~~~~~这是第十八个分隔线~~~~~~~~~")
224
225
226
227 输出如下：
228 哈哈测试一下
229 ~~~~~~~~~这是第一个分隔线~~~~~~~~~
230 哈哈测试一下
231 ~~~~~~~~~这是第二个分隔线~~~~~~~~~
232 哈哈测试一下
233 ~~~~~~~~~这是第三个分隔线~~~~~~~~~
234 id2
235 id3
236 ~~~~~~~~~这是第四个分隔线~~~~~~~~~
237 a_1.html
238 a_2.html
239 a_3.html
240 ~~~~~~~~~这是第五个分隔线~~~~~~~~~
241 a_1.html
242 a_2.html
243 a_3.html
244 ~~~~~~~~~这是第六个分隔线~~~~~~~~~
245 a_1
246 a_2
247 a_3
248 ~~~~~~~~~这是第七个分隔线~~~~~~~~~
249 a_1
250 a_2
251 a_3
252 ~~~~~~~~~这是第八个分隔线~~~~~~~~~
253 span_text1
254 span_text2
255 text_1
256 span_text3
257 span_text4
258 text_2
259 text_22
260 span_text5
261 span_text6
262 text_3
263 span_text7
264 span_text8
265 text_4
266 ~~~~~~~~~这是第九个分隔线~~~~~~~~~
267 0 =====
268 cls_3
269 cls_4
270 1 =====
271 cls_3
272 cls_4
273 2 =====
274 cls_5
275 cls_6
276 3 =====
277 cls_5
278 cls_6
279 ~~~~~~~~~这是第十个分隔线~~~~~~~~~
280 0 =====
281 cls_4
282 1 =====
283 cls_4
284 2 =====
285 cls_6
286 3 =====
287 cls_6
288 ~~~~~~~~~这是第十一个分隔线~~~~~~~~~
289 haha.js
290 haha1.js
291 haha2.js
292 ~~~~~~~~~这是第十二个分隔线~~~~~~~~~
293 text_1
294 text_2
295 text_22
296 ~~~~~~~~~这是第十三个分隔线~~~~~~~~~
297 cls_3
298 cls_3
299 ~~~~~~~~~这是第十四个分隔线~~~~~~~~~
300 span_text1
301 span_text2
302 span_text3
303 span_text4
304 ~~~~~~~~~这是第十五个分隔线~~~~~~~~~
305 a_1
306 a_2
307 a_3
308 ~~~~~~~~~这是第十六个分隔线~~~~~~~~~
309 <element div at 0x1fb1aeb7c08>
310 ~~~~~~~~~这是第十七个分隔线~~~~~~~~~
311 <element div at 0x1fb1aeb7848>
312 ~~~~~~~~~这是第十八个分隔线~~~~~~~~~
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