a small script for get info package on foresight

flgetinfo.py

import urllib
import re

URL ="http://packages.foresightlinux.org/sources/"

class ForesightPackageNotFound(Exception):
    pass

class ForesightInfo:
    def __init__(self, repository, package_name):
        self.repository = repository
        self.package_name = package_name
        self.conary = None
        self.package_recipe = None
        
    def _open_url(self, filename):
       
        url = urllib.urlopen(URL+"%(repository)s/%(package_name)s/%(filename)s" % dict( 
                        package_name = self.package_name, repository = self.repository, filename = filename
                    )
                )
        if url.getcode() == 404:
            raise ForesightPackageNotFound
        #print "getting from web %s" % filename
        return url.read()
        
    def _get_recipe(self):
        if self.package_recipe:
            return self.package_recipe
        self.package_recipe =  self._open_url( "%s.recipe" % self.package_name)
        return self.package_recipe
       
    def _get_conary(self):
        if self.conary:
            return self.conary
        self.conary = self._open_url("CONARY")
        return self.conary
        
    def _get_regex(self,regex):
        file  = self._get_conary()
        regex = re.search(regex,file)
        return regex.groups()[0]
        
    def get_recipe(self):
        return self._get_recipe()
        
    def get_version(self):
        version_string = self._get_regex("\sversion (?P<version>.*?)\s")
        return version_string.split("/")[2].split(":")[1]
   

if __name__ == "__main__":
    import sys
    try:
        fl = ForesightInfo(repository=sys.argv[1],package_name =sys.argv[2])
        fl.get_recipe()
        print fl.get_recipe()
        fl.get_version()
        fl.get_version()
    except ForesightPackageNotFound:
        print "not found"