nameerror:name 'html_doc' is not defined
nameerror:name 'html_doc' is not defined是怎么回事?。?/p>
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2016-02-29
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2016-02-29
需要先定義
#encoding:utf-8 from?bs4?import?BeautifulSoup import?re html_doc?=?""" <html><head><title>The?Dormouse's?story</title></head> <body> <p?class="title"><b>The?Dormouse's?story</b></p> <p?class="story">Once?upon?a?time?there?were?three?little?sisters;?and?their?names?were <a?>Elsie</a>, <a?>Lacie</a>?and <a?>Tillie</a>; and?they?lived?at?the?bottom?of?a?well.</p> <p?class="story">...</p> """ soup?=?BeautifulSoup( ????????html_doc, ????????'html.parser', ????????from_encoding?=?'utf-8') links?=?soup.find_all('a') #?獲取所有超鏈接的元素 for?link?in?links: ????print?link.name,link['href'],link.get_text() #?獲取某個(gè)超鏈接的元素 link_node?=?soup.find('a',?href?=?'http://example.com/tillie') print?'某個(gè)元素：',link.name,link['href'],link.get_text() #?正則表達(dá)式模糊匹配獲取元素 link_node?=?soup.find('a',?re.compile(r'sie')) print?'正則匹配：',link.name,link['href'],link.get_text() #?獲取指定的屬性的節(jié)點(diǎn) link_node?=?soup.find('p',?class_?=?'title') print?'屬性匹配：',link.name,link.get_text()