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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(self, node: AST, dfltChaining: bool = True) -> str: """Process `node` by dispatching to a handler."""

        # print(node.__class__.__name__)
        if node is None:
            return ''
        if isinstance(node, ast.Expression):
            return self.visit(node.body)
        # dispatch to specific or generic method
        method = 'visit_' + node.__class__.__name__
        visitor = getattr(self, method, self.generic_visit)
        return visitor(node, dfltChaining)