| yahoo.search.webservices (version 1.32, Tue Sep 11 15:37:37 MDT 2007) | index /home/leif/hack/pysearch/yahoo/search/webservices.py |
Yahoo Search Web Services
--- NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE ---
This module is deprecated, please see the documentation for
yahoo.search
and use the new class structures. The old DOM parser is also
obsolote, and not distributed with this package at all. For
documentation on the results produced by the various search
classes, please refer to the appropriate DOM parser docs.
--- NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE ---
This module implements a set of classes and functions to work with the
Yahoo Search Web Services. All results from these services are properly
formatted XML, and this package facilitates for proper parsing of these
result sets. Some of the features include:
* Extendandable API, with replaceable backend XML parsers, and
I/O interface.
* Type and value checking on search parameters, including
automatic type conversion (when appropriate and possible)
* Flexible return format, including DOM objects, or fully
parsed result objects
You can either instantiate a search object directly, or use the factory
function create_search() in this module (see below). The supported classes
of searches are:
VideoSearch - Video Search
ImageSearch - Image Search
WebSearch - Web Search
NewsSearch - News Search
LocalSearch - Local Search
RelatedSuggestion - Web Search Related Suggestion
SpellingSuggestion - Web Search Spelling Suggestion
TermExtraction - Term Extraction service
ContextSearch - Web Search with a context
The different sub-classes of Search supports different sets of query
parameters. They all require an application ID parameter (app_id). The
following tables describes all other allowed parameters for each of the
supported services:
Web Related Spelling Context Term
----- ------- -------- ------- ------
query [X] [X] [X] [X] [X]
type [X] . . [X] .
results [X] [X] . [X] .
start [X] . . [X] .
format [X] . . . .
adult_ok [X] . . [X] .
similar_ok [X] . . [X] .
language [X] . . . .
country [X] . . . .
context . . . [X] [X]
Image Video News Local
----- ----- ----- -----
query [X] [X] [X] [X]
type [X] [X] [X] .
results [X] [X] [X] [X]
start [X] [X] [X] [X]
format [X] [X] . .
adult_ok [X] [X] . .
language . . . [X]
country . . . .
sort . . [X] [X]
coloration [X] . . .
radius . . . [X]
street . . . [X]
city . . . [X]
state . . . [X]
zip . . . [X]
location . . . [X]
longitude . . . [X]
latitude . . . [X]
Each of these parameter is implemented as an attribute of each
respective class. For example, you can set parameters like:
from yahoo.search.webservices import WebSearch
app_id = "YahooDemo"
srch = WebSearch(app_id)
srch.query = "Leif Hedstrom"
srch.results = 40
or, if you are using the factory function:
from yahoo.search.webservices import create_search
app_id = "YahooDemo"
srch = create_search("Web", app_id, query="Leif Hedstrom", results=40)
or, the last alternative, a combination of the previous two:
from yahoo.search.webservices import WebSearch
app_id = "YahooDemo"
srch = WebSearch(app_id, query="Leif Hedstrom", results=40)
To retrieve a certain parameter value, simply access it as any normal
attribute:
print "Searched for ", srch.query
For more information on these parameters, and their allowed values, please
see the official Yahoo Search Services documentation available at
http://developer.yahoo.net/
Once the webservice object has been created, you can retrieve a parsed
object (typically a DOM object) using the get_results() method:
dom = srch.get_results()
This DOM object contains all results, and can be used as is. For easier
use of the results, you can use the built-in results factory, which will
traverse the entire DOM object, and create a list of results objects.
results = srch.parse_results(dom)
or, by using the implicit call to get_results():
results = srch.parse_results()
The default XML parser and results factories should be adequate for most
users, so use the parse_results() when possible. However, both the XML
parser and the results parser can easily be overriden. See the examples
below for details.
EXAMPLES:
This simple application will create a search object using the first
command line argument as the "type" (e.g. "web" or "news"), and all
subsequent arguments forms the query string:
#!/usr/bin/python
import sys
from yahoo.search.webservices import create_search
service = sys.argv[1]
query = " ".join(sys.argv[2:])
app_id = "YahooDemo"
srch = create_search(service, app_id, query=query, results=5)
if srch is None:
srch = create_search("Web", app_id, query=query, results=5)
dom = srch.get_results()
results = srch.parse_results(dom)
for res in results:
url = res.Url
summary = res['Summary']
print "%s -> %s" (summary, url)
The same example using the PyXML 4DOM parser:
#!/usr/bin/python
import sys
from yahoo.search.webservices import create_search
from xml.dom.ext.reader import Sax2
query = " ".join(sys.argv[2:])
srch = create_search(sys.argv[1], "YahooDemo", query=query, results=5)
if srch is not None:
reader = Sax2.Reader()
srch.install_xml_parser(reader.fromStream)
.
.
.
The last example will produce the same query, but uses an HTTP proxy
for the request:
#!/usr/bin/python
import sys
from yahoo.search.webservices import create_search
import urllib2
query = " ".join(sys.argv[2:])
srch = create_search(sys.argv[1], "YahooDemo", query=query, results=5)
if srch is not None:
proxy = urllib2.ProxyHandler({"http" : "http://octopus:3128"})
opener = urllib2.build_opener(proxy)
srch.install_opener(opener)
.
.
.
You can obviously "mix and match" as necessary here. I'm using the
installer methods above for clarity, the APIs allows you to pass those
custom handlers as arguments as well (see the documentation below).
| Modules | ||||||
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| Data | ||
| CC_LICENSES = {'cc_any': 'Any', 'cc_commercial': 'Commercial', 'cc_modifiable': 'Modifiable'} COUNTRIES = {'any': 'any', 'ar': 'Argentina', 'at': 'Austria', 'au': 'Australia', 'be': 'Belgium', 'br': 'Brazil', 'ca': 'Canada', 'ch': 'Switzerland', 'cn': 'China', 'cz': 'Czechoslovakia', ...} LANGUAGES = {'ar': 'arabic', 'bg': 'bulgarian', 'ca': 'catalan', 'cs': 'czech', 'da': 'danish', 'de': 'german', 'default': 'english', 'el': 'greek', 'en': 'english', 'es': 'spanish', ...} SERVICES = {'album': (<class 'yahoo.search.audio.AlbumSearch'>, 'Search for a specific music album'), 'artist': (<class 'yahoo.search.audio.ArtistSearch'>, 'Information on a musical performer'), 'context': (<class 'yahoo.search.web.ContextSearch'>, 'Contextual Web Search'), 'image': (<class 'yahoo.search.image.ImageSearch'>, 'Image Search'), 'inlinkdata': (<class 'yahoo.search.site.InlinkData'>, 'Show pages linking to a specific page'), 'local': (<class 'yahoo.search.local.LocalSearch'>, 'Local Search'), 'news': (<class 'yahoo.search.news.NewsSearch'>, 'News Search'), 'pagedata': (<class 'yahoo.search.site.PageData'>, 'Find all pages belonging to a domain'), 'podcast': (<class 'yahoo.search.audio.PodcastSearch'>, 'Search for a Podcast site/feed'), 'related': (<class 'yahoo.search.web.RelatedSuggestion'>, 'Web Search Related Suggestion'), ...} SUBSCRIPTIONS = {'cr': 'Consumer Reports', 'forrester': 'Forrester Research', 'ft': 'FT.com', 'ieee': 'IEEE publications', 'nejm': 'New England Journal of Medicine', 'thestreet': 'TheStreet.com', 'wsj': 'Wall Street Journal'} __author__ = 'Leif Hedstrom <leif@ogre.com>' __date__ = 'Tue Sep 11 15:37:37 MDT 2007' __revision__ = '$Id: webservices.py,v 1.32 2007/09/11 21:38:43 zwoop Exp $' __version__ = '$Revision: 1.32 $' | ||
| Author | ||
| Leif Hedstrom <leif@ogre.com> | ||