code: def visit_raise(self, node):
          
          if node.exc:
              if node.inst:
                  if node.tback:
                      return "raise %s, %s, %s" % (
                          node.exc.accept(self),
                          node.inst.accept(self),
                          node.tback.accept(self),
                      )
                  return "raise %s, %s" % (node.exc.accept(self), node.inst.accept(self))
              return "raise %s" % node.exc.accept(self)
          return "raise"
docs: return an astroid.Raise node as string