ConfigParser that emulates ZendConfigParser (multiple sections inheritance)

gistfile1.py

from ConfigParser import SafeConfigParser, NoOptionError, NoSectionError

class ZendConfigParser(SafeConfigParser):
    def read(self, filenames):
        self._parents = {}
        self._s = {}
        SafeConfigParser.read(self, filenames)
        for section in self.sections():
            if ':' in section:
                s = section.split(':')
                self._parents[s[0]] = s[1]
                self._s[section] = s[1]

    def get(self, section, option, raw=False, vars=None):
        try:
            return SafeConfigParser.get(self, section, option, raw, vars)
        except NoSectionError as e:
            if section in self._parents:
                return self.get(':'.join((section, self._parents[section])), option, raw, vars)
            else:
                raise e
        except NoOptionError:
            if section in self._s:
                return self.get(self._s[section], option, raw, vars)