>>> import ConfigParser
>>> from collections import OrderedDict
>>> class MultiOrderedDict(OrderedDict):
...     def __setitem__(self, key, value):
...         if isinstance(value, list) and key in self:
...             self[key].extend(value)
...         else:
...             super(OrderedDict, self).__setitem__(key, value)
...
>>> config = ConfigParser.RawConfigParser(dict_type=MultiOrderedDict)
>>> config.read(['/usr/local/lib/php.ini'])
['/usr/local/lib/php.ini']
>>> print config.get("exif",  "extension")
['pdo.so', 'pdo_sqlite.so', 'pdo_mysql.so']