code: def _getTempSharedDir(self):
          
          tempDir = self.tempFilesDir
          for i in range(self.levels):
              tempDir = os.path.join(tempDir, random.choice(self.validDirs))
              if not os.path.exists(tempDir):
                  try:
                      os.mkdir(tempDir)
                  except os.error:
                      if not os.path.exists(tempDir): # In the case that a collision occurs and
                          # it is created while we wait then we ignore
                          raise
          return tempDir
docs: Gets a temporary directory in the hierarchy of directories in self.tempFilesDir.
          This directory may contain multiple shared jobs/files.
  
          :rtype : string, path to temporary directory in which to place files/directories.