alias, 16.09.2011 08:39:
code1:
import lxml.html
import urllib
down='http://finance.yahoo.com/q/op?s=C+Options'
content=urllib.urlopen(down).read()
root=lxml.html.document_fromstring(content)
I see this quite often, but many people don't know that this can be
simplified to
import lxml.html
url = 'http://finance.yahoo.com/q/op?s=C+Options'
root = lxml.html.parse(url).getroot()
which is less code, but substantially more efficient.
table = root.xpath("//table[@class='yfnc_mod_table_title1']")[0]
tds=table.xpath("tr[@valign='top']//td")
for td in tds:
print td.text_content()
what i get is :
Call Options
Expire at close Friday, September 16, 2011
these are waht i want.
code2
import lxml.html
import urllib
down='http://finance.yahoo.com/q/op?s=C+Options'
content=urllib.urlopen(down).read()
root=lxml.html.document_fromstring(content)
table = root.xpath("//table[@class='yfnc_mod_table_title1']")[0]
tds=table.xpath("//tr[@valign='top']//td")
Here, you are looking for all "tr" tags in the table recursively, instead
of taking just the ones that are direct children of the "table" tag.
That's what "//" is there for, it's a recursive subtree selector. You might
want to read up on XPath expressions.
what i get is :
N/A
N/A
2
114
48.00
C110917P00048000
16.75
0.00
N/A
N/A
0
23
50.00
C110917P00050000
23.16
0.00
N/A
N/A
115
2,411
Highlighted options are in-the-money.
I don't see any highlighting in your text above, and I don't know what you
mean by "in-the-money".
Stefan
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