show how to access libots C library from Python

libots.py

from ctypes import *
from ctypeslib.contrib.pythonhdr import *

def quick_summary(data,words=150):
    ots = OTS()
    ots.parse_string(data)
    return ots.summarize_by_words(words)

class OTS:
    libots = None
    article = None
    dict_name = "en"
    
    def __init__(self):
        cdll.LoadLibrary('libots-1.so.0.5.0')
        self.libots = CDLL('libots-1.so.0.5.0')
    
    def parse_file(self,fname):
        self.article = self.libots.ots_new_article()
        self.libots.ots_load_xml_dictionary(self.article,self.dict_name)

        f = open(fname,'r')
        self.libots.ots_parse_file(PyFile_AsFile(f),self.article) #0
        f.close()
        self.libots.ots_grade_doc(self.article)
        
    def parse_string(self,data):
        self.article = self.libots.ots_new_article()
        self.libots.ots_load_xml_dictionary(self.article,self.dict_name)
        
        if type(data) == unicode:
              data = unicode.encode(data, 'utf-8')
        self.libots.ots_parse_stream(data, len(data), self.article)
        self.libots.ots_grade_doc(self.article)
        
    def article_word_count(self):
        return self.libots.ots_get_article_word_count(self.article)

    def summarize_by_words(self,word_count=150):
        self.libots.ots_highlight_doc_words(self.article,word_count)
        summary = self._get_summary_string()
        summary = summary.decode('utf-8')
        return summary

    def _get_summary_string(self):        
        # get summary as string
        bytes_out = c_int()
        self.libots.ots_get_doc_text.restype = c_char_p
        summary = self.libots.ots_get_doc_text(self.article,byref(bytes_out))
        return summary

libots_demo.py

from ctypes import *
from ctypeslib.contrib.pythonhdr import *

cdll.LoadLibrary('libots-1.so.0.5.0')
libots = CDLL('libots-1.so.0.5.0')

f = open('/home/eli/article1.txt','r')
art = libots.ots_new_article()

# load dict
libots.ots_load_xml_dictionary(art,"en")

libots.ots_parse_file(PyFile_AsFile(f),art) #0
word_count = libots.ots_get_article_word_count(art)
print "%d words in the article" % word_count
libots.ots_grade_doc(art)

# libots.ots_highlight_doc (art, 2)
libots.ots_highlight_doc_words(art,200)

bytes_out = c_int()
libots.ots_get_doc_text.restype = c_char_p
summary = libots.ots_get_doc_text(art,byref(bytes_out))
print summary

libots.ots_free_article(art);
f.close()

More info here: http://www.elidickinson.com/story/using-libots-summary-library-with-python/2012-01