xgo

xgoogle

Python library to Google services (google search, google sets, google translate, sponsored links)

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This is a Google library called 'xgoogle'. Current version is 1.4. It's written by Peteris Krumins (peter@catonmat.net). His blog is at http://www.catonmat.net -- good coders code, great reuse. The code is licensed under MIT license. -------------------------------------------------------------------------- At the moment it contains: * Google Search module xgoogle/search.py. http://www.catonmat.net/blog/python-library-for-google-search/ * Google Sponsored Links Search module xgoogle/sponsoredlinks.py http://www.catonmat.net/blog/python-library-for-google-sponsored-links-search/ * Google Sets module xgoogle/googlesets.py http://www.catonmat.net/blog/python-library-for-google-sets/ * Google Translate module xgoogle/translate.py http://www.catonmat.net/blog/python-library-for-google-translate/ -------------------------------------------------------------------------- Here is an example usage of Google Search module: >>> from xgoogle.search import GoogleSearch >>> gs = GoogleSearch("catonmat") >>> gs.results_per_page = 25 >>> results = gs.get_results() >>> for res in results: ... print res.title.encode('utf8') ... output: good coders code, great reuse MIT's Introduction to Algorithms, Lectures 1 and 2: Analysis of ... catonmat - Google Code ... The GoogleSearch object has several public methods and properties: method get_results() - gets a page of results, returning a list of SearchResult objects. property num_results - returns number of search results found. property results_per_page - sets/gets the number of results to get per page. property page - sets/gets the search page. A SearchResult object has three attributes -- "title", "desc", and "url". They are Unicode strings, so do a proper encoding before outputting them. -------------------------------------------------------------------------- Here is an example usage of Google Sponsored Links Search module: >>> from xgoogle.sponsoredlinks import SponsoredLinks, SLError >>> sl = SponsoredLinks("video software") >>> sl.results_per_page = 100 >>> results = sl.get_results() >>> for result in results: ... print result.title.encode('utf8') ... output: Photoshop Video Software Video Poker Software DVD/Video Rental Software ... The SponsoredLinks object has several public methods and properties: method get_results() - gets a page of results, returning a list of SearchResult objects. property num_results - returns number of search results found. property results_per_page - sets/gets the number of results to get per page. A SponsoredLink object has four attributes -- "title", "desc", "url", and "display_url". They are Unicode strings, don't forget to use a proper encoding before outputting them. -------------------------------------------------------------------------- Here is an example usage of Google Sets module: >>> from xgoogle.googlesets import GoogleSets >>> gs = GoogleSets(['red', 'yellow']) >>> results = gs.get_results() >>> print len(results) >>> for r in results: ... print r.encode('utf8') ... output: red yellow blue white ... The GoogleSets object has only get_results(set_type) public method. The default value for set_type is SMALL_SET, which makes it return 15 related items or fewer. Use LARGE_SET to get more than 15 items. This get_results() method returns a list of related items that are represented as unicode strings. Don't forget to do the proper encoding when outputting these strings! Here is an example showing differences between SMALL_SET and LARGE_SET: >>> from xgoogle.googlesets import GoogleSets, LARGE_SET, SMALL_SET >>> gs = GoogleSets(['python', 'perl']) >>> results_small = gs.get_results() # SMALL_SET by default >>> len(results_small) 11 >>> results_small [u'python', u'perl', u'php', u'ruby', u'java', u'javascript', u'c++', u'c', u'cgi', u'tcl', u'c#'] >>> >>> results_large = gs.get_results(LARGE_SET) >>> len(results_large) 46 >>> results_large [u'perl', u'python', u'java', u'c++', u'php', u'c', u'c#', u'javascript', u'howto', u'wiki', u'raid', u'dd', u'linux', u'ruby', u'language', u'xml', u'sgml', u'svn', u'kernel', ...] -------------------------------------------------------------------------- Here is an example usage of Google Translate module: >>> from xgoogle.translate import Translator >>> >>> translate = Translator().translate >>> print translate("Mani sauc Pēteris", lang_to="ru").encode('utf-8') Меня зовут Петр >>> print translate("Mani sauc Pēteris", lang_to="en") My name is Peter >>> print translate("Меня зовут Петр") My name is Peter The "translate" function takes three arguments - "message", "lang_from" and "lang_to". If "lang_from" is not given, Google's translation service auto-detects it. If "lang_to" is not given, it defaults to "en" (English). In case of an error the "translate" function throws "TranslationError" exception. Make sure to wrap your code in try/except block to catch it: >>> from xgoogle.translate import Translator, TranslationError >>> >>> try: >>> translate = Translator().translate >>> print translate("") >>> except TranslationError, e: >>> print e Failed translating: invalid text The Google Translate module also provides "LanguageDetector" class that can be used to detect the language of the text. Here is an example usage of LanguageDetector: >>> from xgoogle.translate import LanguageDetector, DetectionError >>> >>> detect = LanguageDetector().detect >>> english = detect("This is a wonderful library.") >>> english.lang_code 'en' >>> english.lang 'English' >>> english.confidence 0.28078437000000001 >>> english.is_reliable True The "DetectionError" may get raised if the detection failed. -------------------------------------------------------------------------- Version history: v1.0: * initial release, xgoogle library contains just the Google Search. v1.1: * added Google Sponsored Links Search. * fixed a bug in browser.py that might have thrown an unexpected exception. v1.2: * added Google Sets module v1.3: * added Google Translate module * fixed a bug in browser.py when KeyboardInterrupt did not get propagated. -------------------------------------------------------------------------- That's it. Have fun! :) Sincerely, Peteris Krumins http://www.catonmat.net

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