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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def load_config(self):
 """Loads the configuration."""

    config = dict([(key, value) for key, value in iteritems(self.options)
                   if key in self.cfg.settings and value is not None])
    for key, value in iteritems(config):
      self.cfg.set(key.lower(), value)