text: import os
  import re
  import subprocess
  
  
  class Helper(object):
  
      @staticmethod
      def GetPath(*args):
          _res = ["/"]
          for i in args:
              if i.startswith("/"):
                  _res.append(i[1:])
              else:
                  _res.append(i)
          return os.path.join(*_res)
  
      @staticmethod
      def StripLeftAll(_in, needles):
          while any([_in.startswith(x) for x in needles]):
              for k in needles:
                  if _in.startswith(k):
                      _in = _in.lstrip(k)
          return _in
  
      @staticmethod
      def GetSystemdVersion(rootpath, default):
          try:
              out = subprocess.check_output(
                  ["strings", "-n", "12", Helper.GetPath(rootpath, "/lib/systemd/systemd")], universal_newlines=True)
              for m in re.finditer(r"systemd\s(?P<version>\d\d\d)", out, re.MULTILINE):
                  try:
                      val = int(m.group("version")) / 100.0
                      return str(val)
                  except Exception:
                      pass
              return default
          except subprocess.CalledProcessError:
              return default
  