'Update the dictionary with a comma separated list.'

def update_config(self, in_string):

    pairs = in_string.split(',')
    pairs = [pair.split('=') for pair in pairs]
    for (key, val) in pairs:
        self.dict_[key] = type(self.dict_[key])(val)
    self.__dict__.update(self.dict_)
    return self
