How to ConfigParse a file keeping multiple values for identical keys?

Question

I need to be able to use the ConfigParser to read multiple values for the same key. Example config file:

[test]
foo = value1
foo = value2
xxx =          


        

Answer 1

in python 3.8 you need to also add strict=False:

class MultiOrderedDict(OrderedDict):
    def __setitem__(self, key, value):
        if isinstance(value, list) and key in self:
            self[key].extend(value)
        else:
            super().__setitem__(key, value)

config = ConfigParser.RawConfigParser(dict_type=MultiOrderedDict, strict=False)
config.read(['a.txt'])
print config.get("test",  "foo")
print config.get("test",  "xxx")