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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 Parse(self, cmd, args, stdout, stderr, return_val, time_taken, knowledge_base):
 """Parse the rpm -qa output."""

    _ = time_taken, args, knowledge_base  # Unused.
    rpm_re = re.compile(r"^(\w[-\w\+]+?)-(\d.*)$")
    self.CheckReturn(cmd, return_val)
    packages = []
    for line in stdout.splitlines():
      pkg_match = rpm_re.match(line.strip())
      if pkg_match:
        name, version = pkg_match.groups()
        status = rdf_client.SoftwarePackage.InstallState.INSTALLED
        packages.append(
            rdf_client.SoftwarePackage(
                name=name, version=version, install_state=status))
    if packages:
      yield rdf_client.SoftwarePackages(packages=packages)

    for line in stderr.splitlines():
      if "error: rpmdbNextIterator: skipping h#" in line:
        yield rdf_anomaly.Anomaly(
            type="PARSER_ANOMALY", symptom="Broken rpm database.")
        break