code: def process_lsof(self, users, types):
          
          d = {}
          for u in users:
              d[u] = {}
              tmp = os.popen("lsof -wbu %s | awk '{ print $5 }'" % (
                  u)).read().split()
              for t in types:
                  d[u][t] = tmp.count(t)
          return d
docs: Get the list of users and file types to collect for and collect the
          data from lsof