import requests_kerberos

  except ImportError:  # pragma: no cover

      requests_kerberos = None

  import shutil

  import signal

  import socket

      # see Maximum RPM Appendix A: Format of the RPM File

      def __init__(self, data):

          if data[0:3] != RPM_HEADER_MAGIC:

              raise GenericError("Invalid rpm header: bad magic: %r" % (data[0:3],))

          self.header = data

  def get_rpm_header(f, ts=None):

      """Return the rpm header."""

      if ts is None:

          ts = rpm.TransactionSet()

          ts.setVSFlags(rpm._RPMVSF_NOSIGNATURES|rpm._RPMVSF_NODIGESTS)

          'requests-kerberos',

          'six',

          #'libcomps',

          #'rpm',

      ]

      if sys.version_info[0] < 3: