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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 _ProcessSources(self, sources, parser_factory):
 """Iterates through sources yielding action responses."""

    for source in sources:
      for action, request in self._ParseSourceType(source):
        yield self._RunClientAction(action, request, parser_factory,
                                    source.path_type)