How to print the empty data present in a table from its HTML code?

问题

I am using the HTMLParser module present in python to print the data in a table by parsing the HTML page through the HTMLParser. I am unable to print the empty field in the table.

Here is the code I'm using:

class MyParser(HTMLParser):
    def __init__(self, data ):
        HTMLParser.__init__(self)
        self.feed(data)
    def handle_data(self, data):
        print "result -->", data

m = MyParser("""<p>105</p><p></p>""")

result --> 105

I am able to print the data between the first tag 105. I want to print the empty data present between the second tag . How do I do it?

HTMLPAGE  = """<p>105</p></td><td style="width:50px; word-wrap: break-word;"><p style="width: 8em; padding-left: 0px; padding-right: 0px; margin: 0pt;"></p></td><td style="width:50px; word-wrap: break-word;">"""

I want print the data as the empty string(""). Any help?..

回答1:

Well, if you really need this, try using handle_endtag:

class MyParser(HTMLParser):
    def __init__(self, data ):
        HTMLParser.__init__(self)
        self.data = ""
        self.feed(data)
    def handle_data(self, data):
        self.data = data
    def handle_endtag(self, tag, attrs):
        print "result -->", self.data
        self.data = ""

m = MyParser("""<p>105</p><p></p>""")

This way every time tag ends, you will print the data that was inside. This will, however, treat  as two times "empty data" - before every tag ending. If this is close to (but not exactly) what you need, try spending some time on using also handle_starttag, so your code can behave the way you want it to.

来源：https://stackoverflow.com/questions/7007858/how-to-print-the-empty-data-present-in-a-table-from-its-html-code

标签

python

html-parsing