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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def visit_assert(self, node, parent):
 """visit a Assert node by returning a fresh instance of it"""

        newnode = nodes.Assert(node.lineno, node.col_offset, parent)
        if node.msg:
            msg = self.visit(node.msg, newnode)
        else:
            msg = None
        newnode.postinit(self.visit(node.test, newnode), msg)
        return newnode