message: Fixed peer review error. GH
diff: @@ -338,7 +338,7 @@ class Node(object):
  def walkBlocks(self):
  start=None
  end=None
  - if self.trans is None and self.transId in self.transCache:
  + if self.trans is None and self.transId in self.transCache.keys():
  self.trans=self.transCache[self.transId]
  if self.trans is not None:
  cntxt=Node.Context(self.trans, "trans")
  