debug_python_ast.js

const { getParser, initGrammars, loadAllGrammars } = require('./dist/extraction/grammars');

(async () => {
 await initGrammars();
 await loadAllGrammars();

 const parser = getParser('python');

 const code = `class Child(Parent):
 pass`;

 const tree = parser.parse(code);

 function walk(node, depth = 0) {
 const indent = ' '.repeat(depth);
 const preview = node.text.substring(0, 30).replace(/\n/g, '\\n');
 console.log(`${indent}${node.type} [${node.startPosition.row}:${node.startPosition.column}] "${preview}"`);
 
 for (let i = 0; i < node.namedChildCount; i++) {
 const child = node.namedChild(i);
 if (child) walk(child, depth + 1);
 }
 }

 walk(tree.rootNode);
})();