code: def hget(self, hashroot, key, default = _sentinel, fast_only = True):
          
          hroot = self.root / hashroot
          hfile = hroot / gethashfile(key)
  
          d = self.get(hfile, _sentinel )
          #print "got dict",d,"from",hfile
          if d is _sentinel:
              if fast_only:
                  if default is _sentinel:
                      raise KeyError(key)
  
                  return default
  
              # slow mode ok, works even after hcompress()
              d = self.hdict(hashroot)
  
          return d.get(key, default)
docs: hashed get