'Set source list for a chosen key: boosting_sources, boosting_enabled, boosting_disabled, or archive_sources.
:param source_list: One of boosting_sources,
boosting_enabled,
boosting_disabled,
archive_sources
:param key: the ConfigObj key'

def set_credit_mining_sources(self, source_list, key):

    self.config['credit_mining'][('%s' % key)] = source_list
