運用css選擇器：
# -*- coding: utf-8 -*-
from lxml import html
page_html = ''' <html><body> <input id="input_id" value="input value" name="input_a"> </body></html> '''
page_tree = html.fromstring(page_html.decode('utf-8'))
ele = page_tree.cssselect('#input_id') # 用css選擇器的id選擇器獲取網頁內容
print html.tostring(ele[0]) # <input id="input_id" value="input value" name="input_a">
print ele # [<InputElement 30133f0 name='input_a' type='text'>]
print ele[0] # <InputElement 30133f0 name='input_a' type='text'>
print ele[0].get('value') # input value
獲取標簽里的內容：
# -*- coding: utf-8 -*-
from lxml import html
page_html = ''' <html><body> <div class="cl">DIV1</div> <div class="cl">DIV2</div> </body></html> '''
page_tree = html.fromstring(page_html.decode('utf-8'))
ele = page_tree.cssselect('body')[0].findall("div") # findall尋找所有的直接子標簽
print ele[0].text_content().strip() # DIV1
若提示如下錯誤：
from lxml import html
ImportError: DLL load failed: %1 is not a valid Win32 application.
嘗試重新安裝lxml模塊：
python -m pip uninstall lxml
python -m pip install lxml==3.6.0