304             self._nodepos = None

   304             self._nodepos = None

   305 

   305 

   306     def rev(self, node):

   306     def rev(self, node):

   307         try:

   307         try:

   308             return self._nodecache[node]

   308             return self._nodecache[node]

   309         except RevlogError:

   311         except RevlogError:

   310             # parsers.c radix tree lookup failed

   312             # parsers.c radix tree lookup failed

   311             raise LookupError(node, self.indexfile, _('no node'))

   313             raise LookupError(node, self.indexfile, _('no node'))

   312         except KeyError:

   314         except KeyError:

   313             # pure python cache lookup failed

   315             # pure python cache lookup failed