本文整理汇总了Python中pattern.web.DOM.get_elements_by_tagname方法的典型用法代码示例。如果您正苦于以下问题：Python DOM.get_elements_by_tagname方法的具体用法？Python DOM.get_elements_by_tagname怎么用？Python DOM.get_elements_by_tagname使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类pattern.web.DOM的用法示例。
在下文中一共展示了DOM.get_elements_by_tagname方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: DOM
# 需要导入模块: from pattern.web import DOM [as 别名]
# 或者: from pattern.web.DOM import get_elements_by_tagname [as 别名]
# The DOM (Document Object Model) parses a string of HTML
# and returns a tree of nested Element objects.
# The DOM elements can then be searched by tag name, CSS id, CSS class, ...
# For example, top news entries on Reddit are coded as:
# <div class="entry">
# <p class="title">
# <a class="title " href="http://i.imgur.com/yDyPu8P.jpg">Bagel the bengal, destroyer of boxes</a>
# ...
# </div>
#
# ... which - naturally - is a picture of a cat.
url = URL("http://www.reddit.com/top/")
dom = DOM(url.download(cached=True))
# print dom.body.content
for e in dom.get_elements_by_tagname("div.entry")[:5]: # Top 5 reddit entries.
for a in e.get_elements_by_tagname("a.title")[:1]: # First <a class="title"> in entry.
print plaintext(a.content)
print a.attributes["href"]
print
# The links in the HTML source code may be relative,
# e.g., "../img.jpg" instead of "www.domain.com/img.jpg".
# We can get the absolute URL by prepending the base URL.
# However, this can get messy with anchors, trailing slashes and redirected URL's.
# A good way to get absolute URL's is to use the module's abs() function:
from pattern.web import abs
url = URL("http://nodebox.net")
for link in DOM(url.download()).by_tag("a"):
link = link.attributes.get("href", "")