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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 make_replacement_visitor(find_expression, replace_expression):
 """Return a visitor function that replaces every instance of one expression with another one."""

    def visitor_fn(expression):
        """Return the replacement if this expression matches the expression we're looking for."""
        if expression == find_expression:
            return replace_expression
        else:
            return expression

    return visitor_fn