def visit_slice(self, node, parent):
"""visit a Slice node by returning a fresh instance of it"""
newnode = new.Slice()
_lineno_parent(node, newnode, parent)
newnode.lower = self.visit(node.lower, newnode)
newnode.upper = self.visit(node.upper, newnode)
newnode.step = self.visit(node.step, newnode)
newnode.set_line_info(newnode.last_child())
return newnode
def visit_sliceobj(self, node, parent, slice=False):
"""visit a Slice or Sliceobj; transform Sliceobj into a astng.Slice"""
newnode = new.Slice()
self._set_infos(node, newnode, parent)
if slice:
subs = [node.lower, node.upper, None]
else:
subs = node.nodes
if len(subs) == 2:
subs.append(None)
newnode.lower = self.visit(_filter_none(subs[0]), newnode)
newnode.upper = self.visit(_filter_none(subs[1]), newnode)
newnode.step = self.visit(_filter_none(subs[2]), newnode)
return newnode