如何使用pycparser删除AST节点？

from pycparser import c_parser, c_ast, parse_file

ast = parse_file('source_code.c', use_cpp=True)

class NodeDeleter(c_ast.NodeVisitor):
    def visit_* (self, node):
        # 处理不同类型的AST节点
        # 删除需要删除的节点
        # ...
        # 递归访问子节点
        self.generic_visit(node)

deleter = NodeDeleter()
deleter.visit(ast)

modified_code = ast.ext[0].to_c()

from pycparser import c_parser, c_ast, parse_file

class NodeDeleter(c_ast.NodeVisitor):
    def visit_* (self, node):
        # 处理不同类型的AST节点
        # 删除需要删除的节点
        # ...
        # 递归访问子节点
        self.generic_visit(node)

ast = parse_file('source_code.c', use_cpp=True)
deleter = NodeDeleter()
deleter.visit(ast)
modified_code = ast.ext[0].to_c()