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Improve HTMLParser example in the doc and fix a couple minor things.

This commit is contained in:
Ezio Melotti 2011-10-28 14:34:56 +03:00
parent f50ffa94ab
commit f99e4b5dbe
1 changed files with 18 additions and 22 deletions
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40
Doc/library/html.parser.rst
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@ -101,9 +101,9 @@ An exception is defined as well:
.. method:: HTMLParser.handle_startendtag(tag, attrs)
Similar to :meth:`handle_starttag`, but called when the parser encounters an
XHTML-style empty tag (``<a .../>``). This method may be overridden by
XHTML-style empty tag (``<img ... />``). This method may be overridden by
subclasses which require this particular lexical information; the default
implementation simple calls :meth:`handle_starttag` and :meth:`handle_endtag`.
implementation simply calls :meth:`handle_starttag` and :meth:`handle_endtag`.
.. method:: HTMLParser.handle_endtag(tag)
@ -178,27 +178,23 @@ An exception is defined as well:
Example HTML Parser Application
-------------------------------
As a basic example, below is a very basic HTML parser that uses the
:class:`HTMLParser` class to print out tags as they are encountered::
As a basic example, below is a simple HTML parser that uses the
:class:`HTMLParser` class to print out start tags, end tags, and data
as they are encountered::
>>> from html.parser import HTMLParser
>>>
>>> class MyHTMLParser(HTMLParser):
... def handle_starttag(self, tag, attrs):
... print("Encountered a {} start tag".format(tag))
... def handle_endtag(self, tag):
... print("Encountered a {} end tag".format(tag))
...
>>> page = """<html><h1>Title</h1><p>I'm a paragraph!</p></html>"""
>>>
>>> myparser = MyHTMLParser()
>>> myparser.feed(page)
Encountered a html start tag
Encountered a h1 start tag
Encountered a h1 end tag
Encountered a p start tag
Encountered a p end tag
Encountered a html end tag
from html.parser import HTMLParser
class MyHTMLParser(HTMLParser):
def handle_starttag(self, tag, attrs):
print("Encountered a start tag:", tag)
def handle_endtag(self, tag):
print("Encountered an end tag:", tag)
def handle_data(self, data):
print("Encountered some data:", data)
parser = MyHTMLParser()
parser.feed('<html><head><title>Test</title></head>'
'<body><h1>Parse me!</h1></body></html>')
.. rubric:: Footnotes