code: def Entry(self, name, directory = None, create = 1):
          
          return self._lookup(name, directory, Entry, create)
docs: Look up or create a generic Entry node with the specified name.
          If the name is a relative path (begins with ./, ../, or a file
          name), then it is looked up relative to the supplied directory
          node, or to the top level directory of the FS (supplied at
          construction time) if no directory is supplied.