code: def propget(self, prop, rev, path=None):
          
          rev, prefix = self._maprev(rev)
          if path is None:
              return self._propget(prop, str(rev), None)
          else:
              path = type(self).cleanPath(_join(prefix, path))
              return self._propget(prop, str(rev), path)
docs: Get Subversion property value of the path